@article{10_4064_aa116_4_2,
     author = {J. Kaczorowski and A. Perelli},
     title = {On the structure of the {Selberg} class, {VI:
} non-linear twists},
     journal = {Acta Arithmetica},
     pages = {315--341},
     publisher = {mathdoc},
     volume = {116},
     number = {4},
     year = {2005},
     doi = {10.4064/aa116-4-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa116-4-2/}
}