Integrating Ideas About Invisible Playgrounds from Play Theory into Online Educational Digital Games. - Darryl Charles; Moira McAlister (ICEC, 2004)

Player-Centred Game Design: Adaptive Digital Games. - Darryl Charles; Aphra Kerr; Moira McAlister; Michael McNeill; Julian Kücklich; Michaela M. Black; Adrian Moore 001; Karl Stringer (DiGRA Conference, 2005)