@article{JRAM_1980__313_152191,
     author = {Wen-Ch'ing Winnie Li},
     title = {On the representations of {GL(2).} {I.} {E-factors} and n-closeness.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {27--42},
     publisher = {mathdoc},
     volume = {313},
     year = {1980},
     zbl = {0411.20023},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1980__313_152191/}
}