Espinosa Hios, José Guillermo. “The Principle of Labor Progressivity and Non-Regressiveness in the Jurisprudential Change: An Exam on the Retirement Pay Increase Per Person in Charge of”. Opinión Jurídica, vol. 20, no. 42, May 2021, pp. 181-08, doi:10.22395/ojum.v20n42a7.