1. Beermann, W.: Differentiation at the level of chromosomes. In: Cell differentiation and morphogenesis, p. 29–54 (1966).
2. Cordeiro, A. R.: Chromosomal pairing variability of interspecific hybrids of D. willistony crytic group. Proc. XII Congr. Genet. 191 (1968).
3. Dobzhansky, T., Tan, C. C.: Comparison of the gene arrangement in two species D. pseudoobscura and D. miranda. Z. i. A. V. 72, 88–104 (1936).
4. Evgenev, M. B.: The interchromosomal effect of inversions on crossing-over in the interspecific D. virilis × D. texana hybrids. Genetika (USSR) 2, 68–72 (1970).
5. Fujii, S.: Further studies on salivary chromosomes of D. virilis. Cytologia 12, 435–459 (1942).