@inproceedings{uitbaf, title = "Understanding Idiomatic Traversals Backwards and Forwards", author = "Richard Bird and Jeremy Gibbons and Stefan Mehner and Janis Voigtlaender and Tom Schrijvers", year = "2013", booktitle = "Haskell Symposium", month = "sep", url = "http://www.comlab.ox.ac.uk/jeremy.gibbons/publications/uitbaf.pdf", doi = "10.1145/2503778.2503781", }