Topan I, Neu FRR, Hafiffudin AR, Saleh S, Rahmansyah DF, Nugraha U. MOBILE APPLICATION DESIGN “GROSIRKEUN”TO IMPROVE MICRO SMALL AND MEDIUM ENTERPRISES (MSMEs) PRODUCTIVITY DURING THE COVID-19 PANDEMIC BASED ON E-COMMERCE. CAC. 2022;23(1):5052-5060. Accessed June 11, 2025. https://ca-c.org/index.php/cac/article/view/531