Singh, K. B. and Singh, T.N. and Singh, D.P. and Jethwa, J.L (1994) Effect of discontinuities on strata-movement problems in collieries: a review. Geotechnical and Geological Engineering , 12 (1). pp. 43-62. ISSN 0960-3182

Singh, V.K. and Singh, D.P. (1993) Correlation between point load index and compressive strength for quartzite rocks. Geotechnical and Geological Engineering , 11 (4). pp. 269-272. ISSN 0960-3182