@article{PMF_1917_28_1_a1,
     author = {Witwi\'nski, Romuald},
     title = {O powierzchniach algebraicznych, zawieraj\k{a}cych dwa p\k{e}ki krzywych wymiernych},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {37--48},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {1917},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1917_28_1_a1/}
}