Emil Fischer (1886) "Indole aus Phenylhydrazin" (Indole from phenylhydrazine), Annalen der Chemie, vol. 236, pages 126-151; for Fischer's synthesis of skatole, see page 137. (Fischer was not the first to prepare skatole. It was prepared, via other methods, in 1880 by von Baeyer, and in 1883 by Otto Fischer and German and by Fileti.)
Yokoyama, M. T.; Carlson, J. R. (1979). “Microbial metabolites of tryptophan in the intestinal tract with special reference to skatole”. 《The American Journal of Clinical Nutrition》 32 (1): 173–178. doi:10.1093/ajcn/32.1.173. PMID367144.
Osborne, G. O.; Penman, D. R.; Chapman, R. B. (1975). “Attraction of Aphodius tasmaniae Hope to skatole.”. 《Australian Journal of Agricultural Research》 26 (5): 839–841. doi:10.1071/AR9750839.
Yokoyama, M. T.; Carlson, J. R. (1979). “Microbial metabolites of tryptophan in the intestinal tract with special reference to skatole”. 《The American Journal of Clinical Nutrition》 32 (1): 173–178. doi:10.1093/ajcn/32.1.173. PMID367144.