2227-1899 2227-1899 S2227-18992021000400061 Cuba 00 12 2021 00 12 2021 15 4 61 75

2019 50-8 2017 2020 2020 2019 17 3 2021 ISO. 2021. ISO 25000 2021 JavaTpoint 2018 2017 5 2018 8 2020 2009 XV 375-9 2018 2017 777-83 2018 2018 126