BULZHANOVA, A.N. Problems of Transportation of Energy Resources in the Republic of Kazakhstan: Environmental and Economic Aspect. Public Administration and Civil Service, Нур-Султан, Казахстан, n. 2, p. 88–95, 2015. Disponível em: https://journal.apa.kz/index.php/path/article/view/556. Acesso em: 1 dec. 2025.