1. Steroid receptors in lyophilized tissues and cytosols of calf uterus and human breast tumor;Koenders,1981
2. Preparation of lyophilized reference samples for quality control of steroid receptor measurements;Koenders;Ligand Rev,1981
3. Standardization of steroid receptor assays in human breast cancer—I. Reproducibility of estradiol and progesterone receptor assays;Koenders;Eur J Cancer Clin Oncol,1983
4. 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
5. Establishment of uniformity in steroid receptor determination for protocol B-09 of the national Surgical Adjuvant Breast Project;Wittliff,1981