The DFAs of Finitely Different Languages - Andrew Badr; Ian Shipman (CoRR, 2007)

Hyper-Minimizing Minimized Deterministic Automata. - Viliam Geffert; Andrew Badr; Ian Shipman (AFL, 2008)

Hyper-Minimization in O(n2). - Andrew Badr (CIAA, 2008)

HYPER-MINIMIZATION IN O(n2). - Andrew Badr (Int. J. Found. Comput. Sci., 2009)

Hyper-minimizing minimized deterministic finite state automata. - Andrew Badr; Viliam Geffert; Ian Shipman (RAIRO Theor. Informatics Appl., 2009)