Castillo-Millan, J., de la Rosa, J., Garduño-Medina, J. A., Moreno-García, E., AND Ramón-Gallegos, E.. "Cytotoxicity Induced in Breast Cancer by photodynamic Therapy with High Power LEDs" Revista Cubana de Física [Online], Volume 27 Number 2B (15 December 2010)