Singh, J; Bhattacharyya, J. C; Babu, G. S. D; Appakutty, M; Kuppuswamy, K; Moorthy, V; Devendran, P; Velu, C; Sivakumar, R(Astronomical Society of India, 1990-03)
Singh, J; Bhattacharyya, J. C; Babu, G. S. D; Appakutty, M; Kuppuswamy, K; Moorthy, V; Devendran, P; Velu, C; Sivakumar, R(Astronomical Society of India, 1990-03)
Berger, T. E; Bergamini, P; Walker II, A. B. C; Jain, S. K; Saxena, A. K; Bhattacharyya, J. C; Huber, M. H; Tondello, G; Naletto, G; Baker, P. C(SPIE-The International Society for Optical Engineering, 1993)