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