@article{MM2_1982__40_154904,
     author = {Ronald J. Evans},
     title = {Period {Polynomials} for {Generalized} cyclotomic periods.},
     journal = {Manuscripta mathematica},
     pages = {217--244},
     publisher = {mathdoc},
     volume = {40},
     year = {1982},
     zbl = {0499.12001},
     url = {http://geodesic.mathdoc.fr/item/MM2_1982__40_154904/}
}