## Hans-Dieter Ehrich

*Outline of an Algebraic Theory of Structured Objects*

ICALP, 1976.

@inproceedings{ICALP-1976-Ehrich, author = "Hans-Dieter Ehrich", booktitle = "{Proceedings of the Third International Colloquium on Automata, Languages and Programming}", isbn = "0-85224-308-1", pages = "508--530", title = "{Outline of an Algebraic Theory of Structured Objects}", year = 1976, }