@article{CMH_1989__64_1_140160,
     author = {Sun-Yung A. Chang and Paul C. Yang},
     title = {Compactness of isospectral conformal metrics on {S3.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {363--374},
     publisher = {mathdoc},
     volume = {64},
     number = {1},
     year = {1989},
     zbl = {0679.53038},
     url = {http://geodesic.mathdoc.fr/item/CMH_1989__64_1_140160/}
}