@article{JOLT_2007_17_1_a9,
     author = {Maria Vallarino},
     title = {Spectral {Multipliers} on {Damek-Ricci} {Spaces}},
     journal = {Journal of Lie Theory},
     pages = {163--189},
     year = {2007},
     volume = {17},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2007_17_1_a9/}
}