@article{MS2_1985__57_166957,
     author = {Thomas P. Branson},
     title = {Differential operators cononically associated to a conformal structure.},
     journal = {Mathematica Scandinavica},
     pages = {293--345},
     year = {1985},
     volume = {57},
     zbl = {0596.53009},
     url = {http://geodesic.mathdoc.fr/item/MS2_1985__57_166957/}
}