@article{10_4064_cm_20_2_269_271,
     author = {A. M\k{a}kowski and A. Rotkiewicz},
     title = {On pseudoprime numbers of special form},
     journal = {Colloquium Mathematicum},
     pages = {269--271},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1969},
     doi = {10.4064/cm-20-2-269-271},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-20-2-269-271/}
}