@article{CMUC_2001__42_4_a8,
     author = {\v{S}{\'\i}r, Zbyn\v{e}k},
     title = {Properties of operators occurring in the {Penrose} transform},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {681--690},
     publisher = {mathdoc},
     volume = {42},
     number = {4},
     year = {2001},
     mrnumber = {1883377},
     zbl = {1090.53504},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2001__42_4_a8/}
}