Rita - an Editor and User Interface for Manipulating Structured Documents. - Donald D. Cowan; E. W. Mackie; G. M. Pianosi; G. de V. Smit (Electron. Publ., 1991)

CIRL/PIWI: a GUI Toolkit Supporting Retargetability. - Donald D. Cowan; C. M. Durance; E. Giguère; G. M. Pianosi (Softw. Pract. Exp., 1993)