@article{PA_2002_9_a1,
     author = {A. D\c{e}bi\'nska-Nag\'orska and A. Just and Z. Stempie\'n and K. Wo\'znica},
     title = {Optimal control problem of some differential inclusion and approximation},
     journal = {Problemy analiza},
     pages = {14--22},
     publisher = {mathdoc},
     number = {9},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PA_2002_9_a1/}
}