Mayer, Niels P. "The WINTERP OSF/Motif Widget INTERPreter -- A graphical user-interface language for rapid prototyping and delivering extensible applications" pp248-269

[Proceedings] (1991) Proceedings Motif '91, First Annual International Motif Users Meeting, Washington DC, December 1991  

Languages mentioned WINTERP {1992} XLISP-PLUS {1990}