Weichselbaum RR, Beckett MA, Vijayakumar S, Simon MA, Awan AM, Nachman J, Panje WR, Goldman ME, Tybor AG, Moran WJ, et al. Radiobiological characterization of head and neck and sarcoma cells derived from patients prior to radiotherapy. Int J Radiat Oncol Biol Phys. 1990 Aug; 19(2):313-9.