Trisula. “Regulatory Challenges and Competitiveness of Blitar UMKM: Acceleration of Halal Certification for Economic Growth”. JURNAL ILMIAH GEMA PERENCANA 4, no. 2 (October 28, 2025): 1285–1304. Accessed December 21, 2025. https://gemaperencana.id/index.php/JIGP/article/view/279.