1815-7696 1815-7696 S1815-76962020000400746 Cuba 00 12 2020 00 12 2020 18 4 746 758

2016 VII 5 5 33-44 2019 15 3 3 2018 XVII 2 2 14-24 2019 2017 13 60 60 206-9 2018 21 53 53 212-33 2017 9 1 1 120-8 2015 51 1815-7696 1815-7696 2014 12 1 1 8 Ministerio de Educación Superior 2016 2017 20 50 50 2019 XVIII 1 1 103-13 2017 XVI 4 4 65-74