Kumar, K. and Das, S.K. and Achari, J. and Ray , S.K. and Kumar, T.S. (1980) Protective relays. Journal of Mines, Metals & Fuels, 28 (12). pp. 290-293. ISSN 0022-2755

Kumar, T.S. and Paul, M.R. and Dutta, D.P. (1967) A Study of Gascaps in Methane-Air Atmospheres. Journal of Mines, Metals & Fuels, 15 (4). pp. 116-120. ISSN 0022-2755

Kumar, T.S. and Dutta, D.P. (1965) Interference Methanometers. Journal of Mines, Metals & Fuels, 13 (2). pp. 49-54. ISSN 0022-2755