@inproceedings{Koutavas_2006,
    doi = {10.1145/1111037.1111050},
    url = {https://doi.org/10.1145%2F1111037.1111050},
    year = {2006},
    month = {jan},
    publisher = {{ACM}},
    author = {Vasileios Koutavas and Mitchell Wand},
    title = {Small bisimulations for reasoning about higher-order imperative programs},
    booktitle = {Conference record of the 33rd {ACM} {SIGPLAN}-{SIGACT} symposium on Principles of programming languages}
}

@inproceedings{Koutavas_2006, doi = {10.1145/1111037.1111050}, url = {https://doi.org/10.1145%2F1111037.1111050}, year = {2006}, month = {jan}, publisher = {{ACM}}, author = {Vasileios Koutavas and Mitchell Wand}, title = {Small bisimulations for reasoning about higher-order imperative programs}, booktitle = {Conference record of the 33rd {ACM} {SIGPLAN}-{SIGACT} symposium on Principles of programming languages} }