1. Bloom, D. E., 1982. Age patterns of women of first birth, Genus, 38: 101?128.
2. Coale, A. J., 1971. Age patterns of marriage. Population Studies, Vol. 25, No. 1, 193?214.
3. Coale, A. J., 1977. The development of new models of nuptiality and fertility, Population, numéro spécial, 1977: 131?154.
4. Hoem, J. M., 1978. Demographic incidence rates. Theoretical population biology, V. 14(3): 329?327.
5. Johansson, L. and Finnäs, Fjalar, 1983. Fertility of Swedish women born 1927?1960 (Urval, Statistics Sweden).