UTOMO, A. B.; WIDIANA, F. . Green Sister City Cooperation of Surabaya and Kitakyushu: Beyond Ceremonial Paradiplomacy. Thammasat Review, [S. l.], v. 27, n. 2, p. 316–334, 2024. Disponível em: https://sc01.tci-thaijo.org/index.php/tureview/article/view/240960. Acesso em: 9 dec. 2025.