@article{MZ_1993__212_4_174488,
     author = {Alain Valette and M.E.B. Bekka},
     title = {Kazhdan's property {(T)} and amenable representations.},
     journal = {Mathematische Zeitschrift},
     pages = {293--300},
     publisher = {mathdoc},
     volume = {212},
     number = {4},
     year = {1993},
     zbl = {0789.22006},
     url = {http://geodesic.mathdoc.fr/item/MZ_1993__212_4_174488/}
}