@inproceedings{Dreyer_2007,
    doi = {10.1145/1190216.1190229},
    url = {https://doi.org/10.1145%2F1190216.1190229},
    year = {2007},
    month = {jan},
    publisher = {{ACM}},
    author = {Derek Dreyer and Robert Harper and Manuel M. T. Chakravarty and Gabriele Keller},
    title = {Modular type classes},
    booktitle = {Proceedings of the 34th annual {ACM} {SIGPLAN}-{SIGACT} symposium on Principles of programming languages}
}

@inproceedings{Dreyer_2007, doi = {10.1145/1190216.1190229}, url = {https://doi.org/10.1145%2F1190216.1190229}, year = {2007}, month = {jan}, publisher = {{ACM}}, author = {Derek Dreyer and Robert Harper and Manuel M. T. Chakravarty and Gabriele Keller}, title = {Modular type classes}, booktitle = {Proceedings of the 34th annual {ACM} {SIGPLAN}-{SIGACT} symposium on Principles of programming languages} }