@article{ITA_1998__32_1-3_35_0,
     author = {Bern\'atsky, L. and \'Esik, Z.},
     title = {Semantics of flowchart programs and the free {Conway} theories},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {35--78},
     publisher = {EDP-Sciences},
     volume = {32},
     number = {1-3},
     year = {1998},
     mrnumber = {1657511},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1998__32_1-3_35_0/}
}