@article{TAM_1981_7_1_a2,
     author = {Aleksandar Bak\v{s}a},
     title = {The {Pontryagin} principle of maximum and integral principles of mechanics},
     journal = {Theoretical and applied mechanics},
     pages = {21 },
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1981},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAM_1981_7_1_a2/}
}