Ross, H.
1911. Die Pflanzengallen (Cecidien) Mittel- und Nord-Europas ihre Erreger und Biologie und Bestimmungstabellen. pp. 350. Jena.
b. Subterranean and Cave Associations
Banta, A. M.
1907. The Fauna of Mayfield’s Cave. Carnegie Inst. Pub. No. 67. pp. 114.
The cave environment, the vital optimum, and the food relations are discussed. A valuable paper.
Blatchley, W. S.
1896. Indiana Caves and their Fauna. Twenty-first Ann. Rep. Geol. and Natural Resources of Indiana, pp. 121-212.
Dendy, A.
1896. The Cryptozoic Fauna of Australasia. Austr. Assoc. Adv. Sci., 1895, pp. [1-21].