Hardiyanti, M.; Hanindriyo, L.; Widita, E.; Dewi, W. M. K.; A'yun, I. N. Q.; Amelia, R. N.; Rahmadani, A. N. Perspectives of Teachers and Food Sellers on Healthy Canteens in Yogyakarta: A Qualitative Study. IJND 2025, 13, 421-432.