Bhowmick, Partha, Arindam Biswas, and Bhargab B. Bhattacharya. “Thinning-Free Polygonal Approximation of Thick Digital Curves Using Cellular Envelope”. ELCVIA Electronic Letters on Computer Vision and Image Analysis 7, no. 2 (February 19, 2008): 76–95. Accessed June 5, 2025. https://elcvia.cvc.uab.cat/article/view/v7-n2-bhowmick-biswas-bhattacharya.