@article{10_14708_cm_v13i1_5654,
     author = {K. Szymiczek},
     title = {On the distribution of prime factors of {Mersenne} numbers},
     journal = {Commentationes Mathematicae},
     pages = { 33--49},
     publisher = {mathdoc},
     volume = {13},
     number = {1},
     year = {1969},
     doi = {10.14708/cm.v13i1.5654},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v13i1.5654/}
}