Valverde Gomez OA, Trejos Moncayo CR, Paz JA. Covid Effects on companys of Nariño - Colombia: A view from maketing. In: Avendaño Avendaño M, Mondragón Arévalo SR, editors. Perspectives and interactions between the physical and virtual worlds for New Socioeconomic Development Challenges [Internet]. Colombia,CO: Sello Editorial UNAD; 2024 [cited 2026 Nov. 2]. pp. 171-94. (Administrative, Accounting, Economic and Business). Available from: https://libros.unad.edu.co/index.php/selloeditorial/catalog/book/275/chapter/1654