1. Effect of exogenous estrogens on serum pregnenolone, cortisol and androgens in postmenopausal women;Abraham;Obstet Gynecol,1975
2. Cigarette smoking and the age at menopause;Adena;Ann Hum Biol,1982
3. Osteoporosis after oophorectomy for non malignant disease;Aitken;Br Med J,1973
4. Reproductive history and postmenopausal risk of hip and forearm fracture;Alderman;Am J Epidemiol,1986
5. An epidemiological study of cervical and trochanteric fractures in the femur in an urban population: analysis of 1,664 cases with special reference to etiological factors;Alffram;Acta Orthop Scand,1964