@article{10_14708_ma_v38i1_254,
     author = {Andrzej Grzybowski and Zdzis{\l}aw Porosi\'nski and Krzysztof J. Szajowski},
     title = {Trybula's papers related to optimal control},
     journal = {Mathematica Applicanda},
     pages = { 97--116},
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {2010},
     doi = {10.14708/ma.v38i1.254},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/ma.v38i1.254/}
}