@article{SIGMA_2007_3_a110,
     author = {Andreas \v{C}ap and Vladim{\'\i}r Soucek},
     title = {Curved {Casimir} {Operators} and the {BGG} {Machinery}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2007},
     volume = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2007_3_a110/}
}