@article{CM_1978__37_2_121_0,
     author = {Karel, M.},
     title = {Eisenstein series and fields of definition},
     journal = {Compositio Mathematica},
     pages = {121--169},
     publisher = {Sijthoff et Noordhoff International Publishers},
     volume = {37},
     number = {2},
     year = {1978},
     mrnumber = {504630},
     zbl = {0399.10027},
     language = {en},
     url = {http://www.numdam.org/item/CM_1978__37_2_121_0/}
}