@article{TAM_1994_20_1_a5,
     author = {{\DJ}. S. {\DJ}uki\'c and T. M. Atanackovi\'c},
     title = {A note on the {Ritz} approach to the extremal curves},
     journal = {Theoretical and applied mechanics},
     pages = {59 },
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1994},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAM_1994_20_1_a5/}
}