Siregar, Onan Marakali, and Nicholas Marpaung. “Open Innovation of Small Business in The City of Medan: Alternative Processes Towards Business Model Innovation”. Research Horizon 4, no. 2 (March 1, 2024): 117–128. Accessed July 9, 2026. https://lifescifi.com/journal/index.php/RH/article/view/238.