@article{10_4064_ap_6_3_265_268,
     author = {A. Szybiak},
     title = {On some constants related to the generalized potentials},
     journal = {Annales Polonici Mathematici},
     pages = {265--268},
     year = {1959},
     volume = {6},
     number = {3},
     doi = {10.4064/ap-6-3-265-268},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-6-3-265-268/}
}