@article{ARM_2006__42_5_a5,
     author = {Branson, Thomas and Hong, Doojin},
     title = {Spectrum generating on twistor bundle},
     journal = {Archivum mathematicum},
     pages = {169--183},
     publisher = {mathdoc},
     volume = {42},
     number = {5},
     year = {2006},
     mrnumber = {2322405},
     zbl = {1164.53358},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2006__42_5_a5/}
}