@article{10_4064_aa122_3_5,
     author = {Andrew Knightly and Charles Li},
     title = {A relative trace formula proof of the {Petersson} trace formula},
     journal = {Acta Arithmetica},
     pages = {297--313},
     publisher = {mathdoc},
     volume = {122},
     number = {3},
     year = {2006},
     doi = {10.4064/aa122-3-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa122-3-5/}
}