Ramadhanti, H., and M. Prasetyawati. “Increasing Production Productivity at UMKM Kaca Berkah Using the OMAX Method”. Greeners: Journal of Green Engineering for Sustainability, vol. 2, no. 2, May 2025, pp. 50-55, https://journal.uvers.ac.id/index.php/greeners/article/view/276.