Development and study of an automatic AC bridge for impedance measurement. - Mita Dutta; Anjan Rakshit; S. N. Bhattacharyya (IEEE Trans. Instrum. Meas., 2001)

One-sided finite-difference approximations suitable for use with Richardson extrapolation. - Rahul Kumar; S. N. Bhattacharyya (J. Comput. Phys., 2006)