@article{RM_1988_43_5_a5,
     author = {D. N. Akhiezer},
     title = {On~the concept of the rank of a~spherical homogeneous space},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {205--206},
     publisher = {mathdoc},
     volume = {43},
     number = {5},
     year = {1988},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1988_43_5_a5/}
}