I. A. Quiroga-Ramos, G. Fischer, and L. M. Melgarejo, “Effect of foliar applications of boron on the phenological development and fruit set of purple passion fruits (<i>Passiflora edulis</i> f. <i>edulis</i> Sims)”, Rev. Colomb. Cienc. Hortic, vol. 12, no. 1, pp. 20–30, May 2018.