“Selective Photooxidation of Methionine, Tyrosine and Tryptophane Using Thionine and Toluidine Blue As Sensitizers ”. Revista Española de Fisiología 33, no. 4 (December 1, 1977): 297–304. Accessed July 8, 2025. https://revistas.unav.edu/index.php/ref/article/view/49530.