Sossa-Azuela, J. H., Cuevas-Jiménez, E. V. and Zaldivar-Navarro, D. (2010) “Computation of the Euler Number of a Binary Image Composed of Hexagonal Cells”, Journal of Applied Research and Technology, 8(03). doi: 10.22201/icat.16656423.2010.8.03.456.