Roesner, Wolfgang "SESPATH: An ER Manipulation Language" pp72-81

Chen, Peter P. (1985) Chen, Peter P. (ed.): Entity-Relationship Approach: The Use of ER Concept in Knowledge Representation, Proceedings of the Fourth International Conference on Entity-Relationship Approach, Chicago, Illinois, USA, 29-30 October 1985. IEEE Computer Society and North-Holland 1985  

Languages mentioned SESPATH {1985}