Segmentation of fingerprint images using the directional image. - Babu M. Mehtre; N. N. Murthy; Surendra Kapoor; B. Chatterjee (Pattern Recognit., 1987)

Elastic, maximal matching. - R. S. Mitra; N. N. Murthy (Pattern Recognit., 1991)

Detection of singular points in fingerprint images. - V. S. Srinivasan; N. N. Murthy (Pattern Recognit., 1992)