PEREIRA, S.P; COSTA, J.F.C.L; SALVADORETTI, P
 andÂ
KOPPE, J. Mining simulation for room and pillar coal operation. J. S. Afr. Inst. Min. Metall. [online].
2012,
vol.112, n.6, pp. 473-476.
ISSN 0038-223X.
|
|
|
|
PEREIRA, S.P; COSTA, J.F.C.L; SALVADORETTI, P
 andÂ
KOPPE, J. Mining simulation for room and pillar coal operation. J. S. Afr. Inst. Min. Metall. [online].
2012,
vol.112, n.6, pp. 473-476.
ISSN 0038-223X.
|
|
|
|