Zapfack, Louis, Aloys Bernard Nkongmeneck, Jean Francois Villiers, and Margaret Lowman. 1996. “THE IMPORTANCE OF PTERIDOPHYTES IN THE EPIPHYTIC FLORA OF SOME PHOROPHYTES OF THE CAMEROONIAN SEMI-DECIDUOUS RAIN FOREST”. Selbyana 17 (1):76-81. https://journals.flvc.org/selbyana/article/view/120696.