Capitán, F., y M. Román. «Analytical Applications of Anthragalol and Anthrapurpurine. III.- Spectrophotometric Determination of Th (IV) With Anthrapurpurine». Ars Pharmaceutica (Internet), vol. 8, n.º 7-10, junio de 1967, pp. 399-04, https://revistaseug.ugr.es/index.php/ars/article/view/7681.