ASIS for GNAT: Goals, Problems and Implementation Strategy. - Sergey Rybin; Alfred Strohmeier; Eugene Zueff (Ada-Europe, 1995)

Zonnon language experiment, or how to implement a non-conventional object model for .NET. - Jürg Gutknecht; Eugene Zueff (OOPSLA Companion, 2002)

Zonnon for.NET - A Language and Compiler Experiment. - Jürg Gutknecht; Eugene Zueff (JMLC, 2003)