@article{10_1090_S0894_0347_04_00450_3,
     author = {Gover, A. and Hirachi, Kengo},
     title = {Conformally invariant powers of the {Laplacian} \^a€” {A} complete nonexistence theorem},
     journal = {Journal of the American Mathematical Society},
     pages = {389--405},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2004},
     doi = {10.1090/S0894-0347-04-00450-3},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-04-00450-3/}
}