Optimalisasi Pengawasan Bunkering  pada PT. Dharma Lautan Utama Surabaya. Jurnal Matemar (Manajemen dan Teknologi Maritim), [S. l.], v. 6, n. 1, 2025. DOI: 10.59225/qs5rev78. Disponível em: https://e-jurnal.amanjaya.ac.id/index.php/matemar/article/view/46.. Acesso em: 13 oct. 2025.