1. Steroid receptors in breast cancer;DeSombre;N Engl J Med,1979
2. Estrogen Receptor Assays in Breast Cancer,1981
3. Estrogen receptor assay: interlaboratory and intralaboratory variation in the measurement of receptor using dextran-coated charcoal technique: a study sponsored by E.C.O.G.;Raam;Eur J Cancer,1981
4. Establishment of uniformity in steroid receptor determination for protocol B-09 of the national Surgical Adjuvant Breast Project;Wittliff,1981
5. Inter-laboratory variability in estrogen and progestin receptor assays;Koenders;Prog Cancer Res Ther,1984