Richard S. Bird, Ross Paterson. Generalised folds for nested datatypes. Formal Asp. Comput., 11(2):200-222, 1999. [doi]
@article{BirdP99:0,
title = {Generalised folds for nested datatypes},
author = {Richard S. Bird and Ross Paterson},
year = {1999},
url = {http://link.springer.de/link/service/journals/00165/bibs/9011002/90110200.htm},
researchr = {https://researchr.org/publication/BirdP99%3A0},
cites = {0},
citedby = {0},
journal = {Formal Asp. Comput.},
volume = {11},
number = {2},
pages = {200-222},
}