@article{SM_1990_66_1_a0,
     author = {I. M. Gel'fand and M. I. Graev},
     title = {Hypergeometric functions associated with the {Grassmannian} $G_{3,6}$},
     journal = {Sbornik. Mathematics},
     pages = {1--40},
     publisher = {mathdoc},
     volume = {66},
     number = {1},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1990_66_1_a0/}
}