Salminen, Tiina M., Irma E. Saarenmaa, Minna M. Heikkilä, and Matti Hakama. 2000. “Is a Dense Mammographic Parenchymal Pattern a Contraindication to Hormonal Replacement Therapy?”. Acta Oncologica 39 (8):969-72. https://doi.org/10.1080/02841860050215954.