SARMIDI; YERIZAM, M. . .; SYARIF, A. . Syngas Characteristics from UCG Gasification Process with Lignite and Subbituminous Coal Types. International Journal of Research in Vocational Studies (IJRVOCAS), [S. l.], v. 1, n. 2, p. 52–58, 2021. DOI: 10.53893/ijrvocas.v1i2.50. Disponível em: https://journal.gpp.or.id/index.php/ijrvocas/article/view/50. Acesso em: 5 oct. 2024.