@article{10_4064_fm_62_2_191_210,
     author = {K. Urbanik},
     title = {On some numerical constants associated with abstract algebras {II}},
     journal = {Fundamenta Mathematicae},
     pages = {191--210},
     publisher = {mathdoc},
     volume = {62},
     number = {2},
     year = {1968},
     doi = {10.4064/fm-62-2-191-210},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-62-2-191-210/}
}