Homotopy equivalence in graph-like digital topological spaces. - Jason Haarmann; Meg P. Murphy; Casey S. Peters; P. Christopher Staecker (CoRR, 2014)

Homotopy Equivalence in Finite Digital Images. - Jason Haarmann; Meg P. Murphy; Casey S. Peters; P. Christopher Staecker (J. Math. Imaging Vis., 2015)