1. Tanaka, Y. (1952): Continuous and discontinuous variation. Ann. Rept. Nat. Inst. Genet. Japan, 2, 9 (in Japan.).
2. Tanaka, Y. (1962): Studies on the unstable modifiers of multilunar marking of the silkworm. III. Rept. Silk Sci. Res. Inst. Japan, 10, 1-12 (in Japan.).
3. Tanaka, Y. (1967): Unstable multilunar modifying genes in the silkworm, Bombyx mori. I. Proc. Japan Acad., 43(10), 980-985.