Vélez, Fernando "Lambda: An Entity-Relationship Based Query Language for the Retrieval of Structured Documents" pp82-89

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 Lambda {1985}