@article{PMF_1949_47_1_a5,
     author = {Pogorzelski, Witold},
     title = {Sur les propri\'et\'es du potentiel retard\'e},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {61--65},
     publisher = {mathdoc},
     volume = {47},
     number = {1},
     year = {1949},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PMF_1949_47_1_a5/}
}