A fundamental group for digital images. - Gregory Lupton; John Oprea; Nicholas A. Scoville (J. Appl. Comput. Topol., 2021)

Homotopy Theory in Digital Topology. - Gregory Lupton; John Oprea; Nicholas A. Scoville (Discret. Comput. Geom., 2022)

Subdivision of Maps of Digital Images. - Gregory Lupton; John Oprea; Nicholas A. Scoville (Discret. Comput. Geom., 2022)

Digital fundamental groups and edge groups of clique complexes. - Gregory Lupton; Nicholas A. Scoville (J. Appl. Comput. Topol., 2022)