1. 1. Nakamura K. A note on the naturalization of common raccoon in Kanagawa Prefecture.Nat Hist Rep. Kanagawa 1991; 12: 17–19. (in Japanese).
2. 2. Kaufmann JH. Raccoon and allies. In: Canpman, JA, Feldhammer, GA (eds.), Wildlife mammals of North America: Biology, Management, and Economics. Baltimore, Maryland: The Johns Hopkins University Press; 1982: 576–585.
3. 3. Gehrt SD, Fritzell EK. Second estrus and late litters in raccoons. J Mammal 1996; 77: 388–393.
4. 4. Sanderson GC, Nalbandov AV. The reproductive cycle of the raccoon in Illinois. Ill Nat Hist Surv Bull 1973; 31: 29–85.
5. 5. Johnson AS. Biology of the raccoon (Procyon lotor) in Alabama. Bull Ala Agric Exp Stat 1970; 402: 1–148.