INDEX OF A POINT OF 3-D DIGITAL BINARY IMAGE AND ALGORITHM FOR COMPUTING ITS EULER CHARACTERISTIC Article Bykov A.I., Zerkalov L.G., Rodríguez Pineda M.A. Pattern Recognition. Elsevier Science Ltd, United Kingdom. Vol. 32. 1999. P. 845-850
NEW CONNECTED COMPONENTS ALGORITHMS AND INVARIANT TRANSFORMATIONS OF DIGITAL IMAGES Article Bykov A.I., Zerkalov L.G., Albores Velasco F.J., Rodríguez Pineda M.A. Pattern Recognition. Elsevier Science Ltd, United Kingdom. Vol. 31. 1998. P. 1089-1098
ALGORITHMS FOR HOMOTOPY CLASSIFICATION OF BINARY IMAGES Article Bykov A.I., Zerkalov L.G. Pattern Recognition. Elsevier Science Ltd, United Kingdom. Vol. 29. 1996. P. 565-574