J. J. Zapata-Posada, Y. Y. Castro-Rodelo, and M. E. Agudelo-Bedoya, “Grandmothers earlier than expected: women life changes, involvement in grandchildren rising and intergenerational relationships”, Prospectiva, no. 22, pp. 117–140, Oct. 2016, doi: 10.25100/prts.v0i22.1239.