Fagnart, OC., Cambiaso, C., Lejeune, MD., Noël, G., Maisin, H., & Masson, PL. (1985). Prognostic Value of Concentration of Pregnancy-specific Beta-1-glycoprotein (sp1) in Serum of Patients With Breast-cancer. International Journal of Cancer, 36(5), 541-544. https://doi.org/10.1002/ijc.2910360504 (Original work published 1985)