1. A. Balachowsky, Encyclopédie Entom. Vol. 15, 1932. Paris.
2. A. Balachowsky, et L. Mesnil, Les insectes nuisibles aux plantes cultivees. Paris, 1935, pp. 475–480.
3. G. F. Ferris, Microentomology. 6. 1941. p. 33–70.
4. H. Steinitz, Hadar. 11. 1938. pp. 160–163.
5. F. Schrader, Psyche 36, 1929, pp. 232–236.