@article{DAN_1967_176_3_a2,
     author = {I. M. Gel'fand and V. A. Ponomarev},
     title = {A classification of the indecomposable infinitesimal representations of the {Lorentz} group},
     journal = {Doklady Akademii Nauk},
     pages = {502--505},
     publisher = {mathdoc},
     volume = {176},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_176_3_a2/}
}