@article{TAM_1996_22_1_a6,
     author = {Ivan \v{S}estak},
     title = {Optimal control of the system with subdifferential material law},
     journal = {Theoretical and applied mechanics},
     pages = {91 },
     year = {1996},
     volume = {22},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAM_1996_22_1_a6/}
}