@article{SM_1968_4_2_a0,
     author = {L. P. Postnikova and A. Schinzel},
     title = {Primitive divisors of the expression $a^n-b^n$ in algebraic number fields},
     journal = {Sbornik. Mathematics},
     pages = {153--159},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {1968},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_4_2_a0/}
}