ALFATAH, Nurul Huda. Optimal hybrid renewable energy systems for Ponorogo, East Java: techno-economic and environmental analysis. National Sustainable Development Studies, Yogyakarta, Indonesia, v. 1, n. 1, 2025. Disponível em: https://www.iacs.co.id/nsds/article/view/70. Acesso em: 22 sep. 2025.