R. K. SINGH; K. N. SINGH; S. K. DHANORIA; A. BHATT; A. DIXIT. Petrochemistry and Depositional Environment of Permian Coals of Basundhara Block, Ib-Valley Coalfied, Orissa,India. International Journal of Economic and Environmental Geology, [S. l.], v. 1, n. 1, p. 36–41, 2010. DOI: 10.46660/ijeeg.v1i1.645. Disponível em: http://econ-environ-geol.org/index.php/ojs/article/view/645. Acesso em: 29 dec. 2025.