1. Hamburger AW, Salmon SE: Primary bioassay of human tumor stem cells. Science 197:461–463, 1977
2. Salmon SE, Hamburger AW, Soehnlen B: Quantitation of differential sensitivity of human tumor stem cells to anticancer drugs. NEJM 298:1321–1327, 1978
3. Von Hoff DD, Clark GM, Stogdill BJ, Sarosdy MF, O'Brien MT, Casper JT, Mattox DE, Page CP, Cruz AB, Sandbach JF: Prospective clinical trial of a human tumor cloning system. Cancer Res 43:1926–1931, 1983
4. Von Hoff DD, Sandbach JF, Clark GM, Turner JN, Forseth BF, Piccart MJ, Colombo N, Muggia FM: Selection of cancer chemotherapy for a patient by an in vitro assay versus a clinician. J Natl Cancer Inst 82:110–116, 1990
5. Heinemann V, Hertel L, Grindey GB, Plunkett W: Comparison of the pharmacokinetics and toxicity of 2′,2′-difluorodeoxycytidine and 1-b-D-arabinofuranosylcytosine. Cancer Res 48:4024–4031, 1988