@Inproceedings{EPTCS76.3, author = {Bahr, Patrick and Hvitved, Tom}, year = {2012}, title = {Parametric Compositional Data Types}, editor = {Chapman, James and Levy, Paul Blain}, booktitle = {{\rm Proceedings Fourth Workshop on} Mathematically Structured Functional Programming, {\rm Tallinn, Estonia, 25 March 2012}}, series = {Electronic Proceedings in Theoretical Computer Science}, volume = {76}, publisher = {Open Publishing Association}, pages = {3-24}, doi = {10.4204/EPTCS.76.3}, }