0864-2141 0864-2141 S0864-21412023000200018 Cuba Cuba Cuba Cuba 00 06 2023 00 06 2023 37 2 1 2022 36 1 1 2 2019 58 4 4 3 2019 2 4 2019 45 4 4 5 2019 18 5 5 6 Ministerio de Educación Superior (Cuba) 2019 7 2021