Landstad's characterization for full crossed products. Kaliszewski, S.; Quigg, John — 2007 The New York Journal of Mathematics [electronic only]
Fundamental groupoids of k -graphs. Pask, David; Quigg, John; Raeburn, Iain — 2004 The New York Journal of Mathematics [electronic only]
Reflective-coreflective equivalence. Bedos, Erik; Kaliszewski, S.; Quigg, John — 2011 Theory and Applications of Categories [electronic only]
Coactions and fell bundles. Kaliszewski, S.; Muhly, Paul S.; Quigg, John; Williams, Dana P. — 2010 The New York Journal of Mathematics [electronic only]