2076-054X 2076-054X S2076-054X2019004900143 10.18004/pdfce/2076-054x/2019.025.49.143-150 Paraguay 00 12 2019 00 12 2019 25 49 143 150

2017 2017 Espok 2017 Eroski 2017 Ultima Hora 2018 World Economic Forum 2018