@article{10_4064_sm_40_3_245_264,
     author = {K. Gaw\k{e}dzki},
     title = {Functional theory of geodesic fields and its applications to the calculus of variations of multiple integrals},
     journal = {Studia Mathematica},
     pages = {245--264},
     publisher = {mathdoc},
     volume = {40},
     number = {3},
     year = {1971},
     doi = {10.4064/sm-40-3-245-264},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-40-3-245-264/}
}