Adami H.-O., Johansson E. D. B., Vegelius J., and Victor A. “Serum Concentrations of Estrone, Androstenedione, Testosterone and Sex-Hormone-Binding Globulin in Postmenopausal Women With Breast Cancer and in Age-Matched Controls”. Upsala Journal of Medical Sciences, vol. 84, no. 3, Sept. 1979, pp. 259-74, doi:10.3109/03009737909179163.