W. Quitiaquez, I. Simbaña, C. A. Isaza-Roldán, P. Quitiaquez, C. Nieto-Londoño, and F. Toapanta-Ramos, “Review of the state of art of DX-SAHP systems to obtain domestic hot water”, Enfoque UTE, vol. 11, no. 2, pp. pp. 29-46, Apr. 2020.