S.  Anduaga and Halffter, G., ?Escarabajos asociados a madrigueras de roedores (Coleoptera: Scarabaeidae, Scarabaeinae)?, Folia Entomologica Mexicana, vol. 81, pp. 185-197, 1991.

S.  Anduaga and Halffter, G., ?Micofagia en Scarabaeidae?, Simposio Nacional sobre la interaccion, pp. 151-169, 1991.

E.  Barbero and Palestrini, C., ?Gli stadi preimmaginali di Malagoniella (Megathopomima) puncticollis puncticollis (Blanchard, 1843) (Coleoptera: Scarabaeidae: Canthonina)?, Elytron, vol. 5, pp. 215-225, 1991.

Y.  Cambefort, ?Chapter 9. Dung beetles in tropical savannas?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 156-178.

Y.  Cambefort, ?Chapter 4. Biogeography and evolution?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 51-67.

Y.  Cambefort, ?Chapter 2. From Saprophagy to Coprophagy?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 22-35.

Y.  Cambefort and Hanski, I., ?Chapter 3. Dung beetle population biology?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 36-50.

Y.  Cambefort and Walter, P., ?Dung beetles in tropical forests in Africa?, in Dung Beetle Ecology, I.  Hanksi and Cambefort, Y., Eds. Princeton, NJ: Princeton University Press, 1991.

Y.  Cambefort and Walter, P., ?Chapter 11. Dung beetles in tropical forests in Africa?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 198-210.

B. M.  Doube, ?Dung beetles of southern Africa?, in Dung Beetle Ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 133-155.

B. M.  Doube, ?Chapter 8. Dung beetles of Southern Africa?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 133-155.

B. M.  Doube and Wardhaugh, K. G., ?Habitat Associations and Niche Partitioning in an Island Dung Beetle Community?, Acta Oecologica-International Journal of Ecology, vol. 12, pp. 451-459, 1991.

P. B.  Edwards, ?Seasonal-Variation in the Dung of African Grazing Mammals, and Its Consequences for Coprophagous Insects?, Functional Ecology, vol. 5, pp. 617-628, 1991.

G.  Halffter, ?Historical and ecological factors determining the geographic distribution of beetles (Coleoptera: Scarabaeidae: Scarabaeinae)?, Folia Entomologica Mexicana, vol. 82, pp. 195-238, 1991.

M.  Hancox, ?The insect fauna of badger dung?, Entomologist's Monthly Magazine, vol. 127, p. 251, 1991.

I.  Hanksi and Krikken, J., ?Chp. 10. Dung beetles in tropical forests in South-East Asia?, in Dung Beetle Ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991.

I.  Hanski, ?Dung insect community?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton, Jersey: Princeton University Press, 1991, pp. 5-21.

I.  Hanski and Cambefort, Y., ?Dung beetle ecology?. Princeton University Press, Princeton, New Jersey, p. xiii + 481, 1991.

I.  Hanski and Cambefort, Y., ?Chapter 18. Resource partitioning?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 330-349.

I.  Hanski and Cambefort, Y., ?Chapter 16. Spatial processes?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 283-304.

I.  Hanski and Cambefort, Y., ?Chapter 17. Competition in dung beetles?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 305-329.

I.  Hanski and Cambefort, Y., ?Chapter 19. Species richness?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 350-365.

I.  Hanski and Cambefort, Y., ?Species richness?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton, Jersey: Princeton, 1991, pp. 350-365.

D.  Havranek, ?Field notes for Scarabaeidae: Aphodiinae, Hybosorinae and Scarabaeinae (Coleoptera) collected in different areas of Trinidad?, Y.E.S. Quarterly, vol. 8, pp. 26-28, 1991.

H. F.  Howden, Howden, A. T., and Storey, R. I., ?Nocturnal Perching of Scarabaeine Dung Beetles Coleoptera Scarabaeidae in an Australian Tropical Rain Forest?, Biotropica, vol. 23, pp. 51-57, 1991.

J. P.  Lumaret and Stiernet, N., ?Chapter 14. Montane dung beetles?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 242-254.

A.  Estrada and Coates-Estrada, R., ?Howler Monkeys Alouatta-Palliata Dung Beetles Scarabaeidae and Seed Dispersal Ecological Interactions in the Tropical Rain Forest of Los Tuxtlas Mexico?, Journal of Tropical Ecology, vol. 7, pp. 459-474, 1991.

E.  Galante, Garcia, R. M., Barrera, I., and Galindo, P., ?Comparison of Spatial Distribution Patterns of Dung-Feeding Scarabs Coleoptera Scarabaeidae Geotrupidae in Wooded and Open Pastureland in the Mediterranean Dehesa Area of the Iberian Peninsula?, Environmental Entomology, vol. 20, pp. 90-97, 1991.

B. D.  Gill, ?Chapter 12. Dung beetles in tropical American forests?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 211-229.

L. Eugenio Rivera-Cervantes and Garcia-Real, E., ?New locality records for Onthophagus gazella Fabricius (Coleoptera: Scarabaeidae) in Jalisco, Mexico?, The Coleopterists Bulletin, vol. 45, p. 370, 1991.

J. P.  Roth, Macqueen, A., and Bay, D. E., ?Effect of Introduced scarab beetles (Coleoptera: Scarabaeinae) on coprphilic insects in Central Queensland?, Environmental Entomology, vol. 20, pp. 909-914, 1991.

M.  Tyndale-Biscoe and Vogt, W. G., ?Effects of adding exotic dung beetles to native fauna on bush fly breeding in the field?, Entomophaga, vol. 36, pp. 395-401, 1991.

P.  Walter, ?Contribution a la connaissance des scarabeides coprophages du Gabon (Coleoptera: Scarabaeidae). VIII. Le peuplement forestier de la region de Bifoun: donnees bio-ecologiques?, Elytron, vol. 5, pp. 115-123, 1991.

H.  Yasuda, ?Survival rates for two dung beetles species, Onthophagus lenzii Harold and Liatongus phanaeoides Westwood (Coleoptera: Scarabaeidae), in the field?, Applied Entomology and Zoology, vol. 26, pp. 449-456, 1991.

K.  Yokoyama, Kai, H., Koga, T., and Aibe, T., ?Nitrogen mineralization and microbial populations in cow dung, dung balls and underlying soil affected by paracoprid dung beetles?, Soil Biology and Biochemistry, vol. 23, pp. 649-653, 1991.

K.  Yokoyama, Kai, H., Koga, T., and Kawaguchi, S., ?Effect of dung beetle, Onthophagus lenzii H. on nitrogen transformation in cow dung and dug balls?, Soil Science & Plant Nutrition, vol. 37, pp. 341-345, 1991.

K.  Yokoyama, Kai, H., and Tsuchiyama, H., ?Paracoprid dung beetles and gaseous loss of nitrogen from cow dung?, Soil Biology and Biochemistry, vol. 23, pp. 643-647, 1991.

K.  Yokoyama and Miyauchi, N., ?Decomposition of organic matter in cow dung colonized by Onthophagus lenzii Harold (Coleoptera: Scarabaeidae)?, Edaphologia, p. 47, 1991.