G. L. Vides-Hernández, M. A. Velado-Cano, J. D. Pablo-Cea, and V. D. Carmona-Galindo, “Richness and diversity patterns of birds in urban green areas in the center of San Salvador, El Salvador”, Huitzil, vol. 18, no. 2, Oct. 2017, doi: 10.28947/hrmo.2017.18.2.294.