PAREDES-C., Jairo Alonso; ROMERO-R., Luís Miguel; BEDOUT-O., Julián David De  e  BERNAL-R., Carlos Mauricio. Los Cuervos formation’s proximate analysis and coal’s organic petrography in the Chucarima sector (Chitagá, Norte de Santander), Colombia. Bol. cienc. tierra [online]. 2019, n.45, pp.34-40. ISSN 0120-3630.