Stevenson, B.G., Dindal, D.L. (1982): Effect of leaf shape on forest litter spiders: Community organization and microhabitat selection of immature Enoplognatha ovata (Clerck) (Theridiidae). Journal of Arachnology, 10: 165-178.
Stewart, A. (2004): The earth moved: On the remarkable achievements of earthworms. Algonquin Books of Chapel Hill, NC USA.
Stille, A., Brüggl, G. (1995): A simple population model for the evaluation of experimental enchytraeid (Oligochaeta) population data. Acta Zool. Fennica, 196: 265-266. (ve sborníku Haimi & Huhta: XI International Colloquium on Soil Zoology)