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1. B.C.Wilson, M.S.Patterson, L.Lilge, Implicit and explicit dosimetry in photodynamic therapy: a new paradigm, Lasers Med.Sci, 12, 182-199, 1997.

2. T.S.Mang, T.J.Dougherty, W.R.Potter, D.O.Boyle, S.Somer, J.Moan, Photobleaching of porphyrins used in photodynamic therapy and implications for therapy, Photochem.Photobiol., 45, 501-506, 1987.

3. R.Rotomskis. What is the influence of photomodification on photosensitised tumour therapy?,1997.

4. R.Rotomskis, S.Bagdonas, G.Streckyte, R.Wendenburg, W.Dietel, J.Didziapetriene, A.Ibelhauptaite, L.Staciokiene, Phototransformation of sensitizers: 3.Implications for clinical dosimetry, Lasers Med.Sci., 13, 271-278, 1998.

5. R.Rotomskis, G.Streckyte, S.Bagdonas, Phototransformations of sensitizers: 1. Significance of the nature of the sensitizer in the photobleaching process and photoproduct formation in aqueous solution, J.Photochem.Photobiol., B:Biol., 39, 167-171, 1997.

6. V.O.Melnikova, L.N.Bezdetnaya, C.Bour, E.Festor, M.-P.Gramain, J.-L.Merlin, A.Ya.Potapenko, F.Guillemin, Subcellular localization of meta-tetra(hydroxyphenyl)chlorin in human tumor cells subjected to photodynamic treatment, J.Photochem.Photobiol., B:Biol., 49, 6-103, 1999.

7.K.Berg, J.Moan, Lysosomes as photochemical targets, Int.J.Cancer, 59, 814-822, 1994.

8. H.Schneckenburger, M.H.Gschwend, R.Sailer, A.Ruck, W.S.L.Strauss, Time-resolved pH-dependent fluorescence of hydrophilic porphyrins in solution and in cultivated cells, J.Photochem.Photobiol., B:Biol., 27, 251-255, 1995.

9. W.Dietel, C.Fritsch, R.H.Pottier, R.Wendenburg, 5-Aminolevulinic-acid-induced formation of different porphyrins and their photomodifications, Lasers Med.Sci., 12, 226-236, 1997.

10. J.Rotomskiene, R.Kapociute, R.Rotomskis, G.Jonusauskas, T.Szito, A.Nizhnik, Light-induced transformations of hematoporphyrin diacetate and hematoporphyrin, J.Photochem.Photobiol., B:Biol., 2, 373-379, 1988.

11. B.Roeder, H.Wabnitz, Time resolved fluorescence spectroscopy of hematoporphyrin, mesoporphyrin, pheophorbide a and chlorin e6 in ethanol and aqueous solution, J.Photochem.Photobiol., B:Biol., 1, 103-113, 1987.

12. R.Rotomskis, G.Streckyte, S.Bagdonas, Phototransformations of sensitizers: 2. Photoproducts formed in aqueous solutions of porphyrins. J.Photochem.Photobiol., B:Biol., 39, 172-175, 1997.

13. K.Konig, H.Schneckenburger, A.Ruck, R.Steiner, In vivo photoproduct formation during PDT with ALA-induced endogenous porphyrins, J.Photochem.Photobiol., B:Biol., 18, 287-290, 1993.

14. G.Streckyte, K.Berg, J.Moan, Photomodification of ALA-induced protoporphyrin IX in cells in vitro. In: D.Brault, G.Jori, J.Moan, B.Ehrenberg (eds.), Photodynamic tehrapy of cancer II, SPIE, 2325, 58-65, 1994.

15.C. af Klintenberg, A.M.K.Enejder, I.Wang, S.Andersson-Engels, S.Svanberg, K.Svanberg, Kinetic fluorescence studies of 5-aminolevulinic acid-induced protoporphyrin IX accumulation in basal cell carcinomas, J.Photochem.Photobiol., B:Biol., 49,120-128, 1999.