Gutierrez-Leefmans M, Holland CP. SME Platforms as Business Models: A User-Centric Activity-System Approach. cuad.adm. [Internet]. 2019 May 15 [cited 2025 Jan. 19];35(64):52-77. Available from: https://ojs.h-novigo.com/index.php/cuadernos_de_administracion/article/view/7248