@article{10_14708_wm_v15i1_941,
     author = {C. Olech},
     title = {K. {Tatarkiewicz} {Rachunek} wariacyjny, cz. {II}},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 128--129},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1972},
     doi = {10.14708/wm.v15i1.941},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v15i1.941/}
}