N. BOTERO-GARCES and G. MORALES-SOTO, “Influence of Apis mellifera on the production of blackberry from Castilla (Rubus glaucus Benth.)”, Rev. Colomb. Entomol., vol. 21, no. 2, pp. 65–70, Jul. 1995, doi: 10.25100/socolen.v21i2.9964.