"The Inheritance Processes in Prolog", C. Chouraki et al., GRTC/187bis/Mars 1987 (CNRS)
P. Dugerdil (1991). "Inheritance mechanisms in the OBJLOG language: multiple selective and multiple vertical with points of view". Inheritance hierarchies in knowledge representation and programming languages. Chichester, UK: John Wiley and Sons Ltd.
ISBN0-471-92741-4.
"The Inheritance Processes in Prolog", C. Chouraki et al., GRTC/187bis/Mars 1987 (CNRS)
P. Dugerdil (1991). "Inheritance mechanisms in the OBJLOG language: multiple selective and multiple vertical with points of view". Inheritance hierarchies in knowledge representation and programming languages. Chichester, UK: John Wiley and Sons Ltd.
ISBN0-471-92741-4.