APA

Prokopenko S. A., Sementsov V. V. & Dobrovolsky M. S.Technology of extended pillar recovery in room and pillar mining in leading coal producing countries. Review. : .

Chicago

Prokopenko S A, Sementsov V V and Dobrovolsky M S.Technology of extended pillar recovery in room and pillar mining in leading coal producing countries. Review. : .

Harvard

Prokopenko S. A., Sementsov V. V. and Dobrovolsky M. S.Technology of extended pillar recovery in room and pillar mining in leading coal producing countries. Review. : .

MLA

Prokopenko S A, Sementsov V V and Dobrovolsky M S.: . .