@article{TAM_1991_17_1_a12,
     author = {Aleksandar Obradovi\'c},
     title = {Optimal control of a rigid body system in a complex case},
     journal = {Theoretical and applied mechanics},
     pages = {121 },
     year = {1991},
     volume = {17},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAM_1991_17_1_a12/}
}