New connected components algorithms and invariant transformations of digital images. - Alexander I. Bykov; Leonid G. Zerkalov; Francisco J. Albores Velasco; Mario A. Rodríguez Pineda (Pattern Recognit., 1998)

Index of a point of 3-D digital binary image and algorithm for computing its Euler characteristic. - Alexander I. Bykov; Leonid G. Zerkalov; Mario A. Rodríguez Pineda (Pattern Recognit., 1999)