Remark on the definition of an automorphic form
Compositio Mathematica, Tome 59 (1986) no. 1, pp. 3-13. 
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     author = {Averbuch, V.},
     title = {Remark on the definition of an automorphic form},
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     url = {http://archive.numdam.org/item/CM_1986__59_1_3_0/}
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Averbuch, V. Remark on the definition of an automorphic form. Compositio Mathematica, Tome 59 (1986) no. 1, pp. 3-13. http://archive.numdam.org/item/CM_1986__59_1_3_0/

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