@article{10_4064_fm_59_3_263_288,
     author = {K. Urbanik},
     title = {On some numerical constants associated with abstract algebras},
     journal = {Fundamenta Mathematicae},
     pages = {263--288},
     publisher = {mathdoc},
     volume = {59},
     number = {3},
     year = {1966},
     doi = {10.4064/fm-59-3-263-288},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-59-3-263-288/}
}