M. A. Vidor, C. P. Ruiz, B. F. Muñiz, and M. L. Centeno, “Absorption, transport and metabolism of 6-benziladenine in <i>Hyacinthus amethystina</i> cv. Albus explants”, PAB, vol. 33, no. 7, pp. 1037–1045, Jul. 1998.