Fernández-Alonso, José Luis, et al. “Redescription of the Pink Zapotillo of Perú, Phragmotheca Sidereotricha Fern. Alonso (Malvaceae), and Notes on Its Habitat and Distribution”. Revista De La Academia Colombiana De Ciencias Exactas, Físicas Y Naturales, vol. 41, no. 160, Oct. 2017, pp. 319-25, https://doi.org/10.18257/raccefyn.498.