| 1 | Underground mining methods handbook Hustrulid, W. A., ed.Society of Mining Engineers New York 1982 |
| 2 | Techniques in underground mining : selections from Underground mining Gertsch, Richard E., ed Society for Mining, Metallurgy Littleton, CO 1998 |
| 3 | Stability in underground mining, Szwilski, A. B., ed.: 2nd Int... held in Aug. 6-8, 1984, L Society of Mining Engineers of New York 1984 |