Busi, A., L. J. Cardona-Salazar, D. G. Castillo, P. A. Ossa-López, F. A. Rivera-Páez, R. A. Vásquez, and G. J. Castaño-Villa. “Morphological Differences in a Population of Rufous-Collared Sparrow (Zonotrichia Capensis, Statius Müller, 1776) (Passerine, Emberizidae) at Different Elevations in the Tropical Andes”. Biota Neotropica, vol. 20, no. 2, Jan. 2020, //www.biotaneotropica.org.br/BN/article/view/1709.