S. Chattopadhyay, P. P. Das Parameter estimation and reconstruction of digital conics in normal positions. [Citation Graph (0, 0)][DBLP] CVGIP: Graphical Model and Image Processing, 1992, v:54, n:5, pp:385-395 [Journal]
P. P. Das A note on "Distance functions in digital geometry". [Citation Graph (0, 0)][DBLP] Inf. Sci., 1992, v:64, n:1-2, pp:181-190 [Journal]
P. P. Das Lattice of octagonal distances in digital geometry. [Citation Graph (0, 0)][DBLP] Pattern Recognition Letters, 1990, v:11, n:10, pp:663-667 [Journal]
P. P. Das Counting minimal paths in digital geometry. [Citation Graph (0, 0)][DBLP] Pattern Recognition Letters, 1991, v:12, n:10, pp:595-603 [Journal]