@article{10_14708_ma_v22i36_1815,
     author = {Barbara Bi{\l}y},
     title = {Nonlinear optimal control problem with constraints for general {2-D} systems},
     journal = {Mathematica Applicanda},
     pages = { 41--53},
     publisher = {mathdoc},
     volume = {22},
     number = {36},
     year = {1993},
     doi = {10.14708/ma.v22i36.1815},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/ma.v22i36.1815/}
}