@article{10_4064_cm7054_9_2016,
     author = {Paul Pollack},
     title = {A simple proof of a theorem of {Hajdu{\textendash}Jarden{\textendash}Narkiewicz}},
     journal = {Colloquium Mathematicum},
     pages = {217--220},
     publisher = {mathdoc},
     volume = {147},
     number = {2},
     year = {2017},
     doi = {10.4064/cm7054-9-2016},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm7054-9-2016/}
}