@article{10_4153_CJM_1979_070_3,
     author = {Labesse, J-P. and Langlands, R. P.},
     title = {L-Indistinguishability {For} {SL} (2)},
     journal = {Canadian journal of mathematics},
     pages = {726--785},
     year = {1979},
     volume = {31},
     number = {4},
     doi = {10.4153/CJM-1979-070-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-070-3/}
}