@article{PMF_1901_12_1_a1,
     author = {Ricci, G. and Levi-Civita, T.},
     title = {Metody rachunku r\'o\.zniczkowego bezwzgl\k{e}dnego i ich zastosowania},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {11--94},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {1901},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1901_12_1_a1/}
}