V. E. González-Velázquez, E. M. Pedraza-Rodríguez, and L. L. Rodríguez-Rodríguez, “Patients with malignant tributary tumors of palliative care in Placetas municipality”, Univ. Méd. Pinareña, vol. 15, no. 2, pp. 224–232, May 2019.