Peterson, D.E., Zeger, S.L., Remington, P.L. et al. 1991
Tegene, A. 1990
Schneider, L., Klein, B., Murphy, K.M. 1981
Warner, K.E. 1989
Seldon, B.J., Doroodian, K. 1989
Baltagi, B.H., Goel, R.K. 1987
Saffer, H., Chaloupka, F.J. 2000
Grabowski, H.G. 1975
Hamilton, J.L. 1974
National Cancer Institute 2017