@article{PMF_1904_15_1_a1,
     author = {Ricci, G.},
     title = {Wzory zasadnicze w teoryi og\'olnej rozmaito\'sci i ich krzywizny},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {15--22},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1904},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1904_15_1_a1/}
}