@article{FAA_1980_14_3_a11,
     author = {M. Delorm},
     title = {Extensions in the category $\mathcal{O}$ of {Bernshtein--Gel'fand--Gel'fand} applications},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {77--78},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1980_14_3_a11/}
}