@article{MM2_1988__62_3_155340,
     author = {Ulrich Schoenwaelder},
     title = {Irreducible factors of {Psi-Polynomials} over finite fields.},
     journal = {Manuscripta mathematica},
     pages = {187--204},
     publisher = {mathdoc},
     volume = {62},
     number = {3},
     year = {1988},
     zbl = {0658.12011},
     url = {http://geodesic.mathdoc.fr/item/MM2_1988__62_3_155340/}
}