Bjerkaas, E., Parajuli, R., Weiderpass, E., Engeland, A., Maskarinec, G., Selmer, R., & Gram, I. T. (2013). Smoking duration before first childbirth: An emerging risk factor for breast cancer? Results from 302,865 Norwegian women. Springer Netherlands.

Bjerkaas, Eivind, Ranjan Parajuli, Elisabete Weiderpass, Anders Engeland, Gertraud Maskarinec, Randi Selmer, et Inger Torhild Gram. Smoking Duration Before First Childbirth: An Emerging Risk Factor for Breast Cancer? Results From 302,865 Norwegian Women. Springer Netherlands, 2013.

Bjerkaas, Eivind, et al. Smoking Duration Before First Childbirth: An Emerging Risk Factor for Breast Cancer? Results From 302,865 Norwegian Women. Springer Netherlands, 2013.