Lecarme, O. "A General Purpose Conversational System for Graphical Programming" pp171-197

Halpern, Mark I and Shaw Christopher J (eds) (1969) Halpern, Mark I and Shaw Christopher J (eds) "Annual Review in Automatic Programming" (6) 1969 Pergamon Press, Oxford  

Languages mentioned Eulalie {1968} Conversational graphical programming system Euphemie {1968} Hybrid graphical structural programming language