“On the variety of auxinic activity of indol-03-acetic, 4,5-benzoindol-03-acetic and 4,5-naphthoindol-03-acetic acids” (1959) Revista Española de Fisiología, 15(3), pp. 179–187. Available at: https://revistas.unav.edu/index.php/ref/article/view/48910 (Accessed: 13 July 2025).