@article{AUPO_1989_28_1_a13,
     author = {Bene\v{s}, Karel},
     title = {Mathematical description of program diagram},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {243--253},
     year = {1989},
     volume = {28},
     number = {1},
     mrnumber = {1053737},
     zbl = {0727.68010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1989_28_1_a13/}
}