@article{BSMF_2001__129_1_33_0,
     author = {Jacquet, Herv\'e and Nan, Chen},
     title = {Positivity of quadratic base change $L$-functions},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {33--90},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {129},
     number = {1},
     year = {2001},
     doi = {10.24033/bsmf.2386},
     mrnumber = {1871978},
     zbl = {1069.11017},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/bsmf.2386/}
}