A nonnegatively constrained trust region algorithm for the restoration of images with an unknown blur. Bardsley, Johnathan M. — 2005 ETNA. Electronic Transactions on Numerical Analysis [electronic only]
A fixed point formulation of the k -means algorithm and a connection to Mumford-Shah. Bardsley, Johnathan M.; Luttman, Aaron — 2009 Applied Mathematics E-Notes [electronic only]