J. Castro-Bedriñana, D. Chirinos-Peinado, F. Zenteno-Vigo, and G. Castro-Chirinos "Satisfaction of Old Graduates of Zootechnical Engineering for Improvement of Educational Quality at the UNCP", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 2, pp. 166–173, 2020, doi: 10.25046/aj050221.