1. Adams, G.E., Dische, S., Fowler, J.F. and Thomlinson, R.H. Hypoxic cell sensitisers in radiotherapy. Lancet 1: 186–188, 1976.
2. Allen, R.P., Kessel, D., Tharratt, R.S. and Volz, W. Photodynamic therapy of superficial malignancies with NPe6 in man. In: Photodynamic Therapy and Biomedical Lasers, pp. 441–445. Editors: P. Spinelli, M. Dal Fante and R. Marchesini. International Congress Series 1011, Excerpta Medica, Amsterdam, 1992.
3. Alper, T. Dose fractionation and dose rate. In: Cellular Radiobiology, pp. 164–187. Editor: T. Alper. Cambridge University press, Cambridge, 1979.
4. Anholt, H. and Moan, J. Fractionated treatment of CaD2 tumors in mice sensitized with aluminium phthalocyanine tetrasulphonate. Cancer Lett. 61: 263–267, 1991.
5. Baas, P., Murrer, L., Zoetmulder, F.A., et al. Photodynamic therapy as adjuvant therapy in surgically treated pleural malignancies. Br. J. Cancer 76: 819–826, 1997.