Nordsmark, M. ., Bentzen, S. M., & Overgaard, J. . (1994). Measurement of Human Tumour Oxygenation Status by a Polarographic Needle Electrode: An analysis of inter- and intratumour heterogeneity. Acta Oncologica, 33(4), 383–389. https://doi.org/10.3109/02841869409098433