INDRAYANA, M. Classic Performing Arts Supply Chain Modeling in Covid 19 Protocol to Support D.I Yogyakarta Cultural Tourism Using Soft System Methodology. Avant-garde: Jurnal Ilmiah Pendidikan Seni Pertunjukan, [S. l.], v. 2, n. 2, p. 177–184, 2024. DOI: 10.24036/ag.v2i2.135. Disponível em: https://avant-garde.ppj.unp.ac.id/index.php/avant-garde/article/view/135. Acesso em: 1 feb. 2025.