Baumann, Michael, et al. “Radiobiological Hypoxia, Oxygen Tension, Interstitial Fluid Pressure and Relative Viable Tumour Area in Two Human Squamous Cell Carcinomas in Nude Mice During Fractionated Radiotherapy”. Acta Oncologica, vol. 40, no. 4, Jan. 2001, pp. 519-28, doi:10.1080/02841860121330.