@article{10_4064_aa_8_2_213_223,
     author = {Andrzej Schinzel},
     title = {On primitive prime factors of {Lehmer} numbers {I}},
     journal = {Acta Arithmetica},
     pages = {213--223},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {1962},
     doi = {10.4064/aa-8-2-213-223},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-8-2-213-223/}
}