@article{VMUMM_2005_4_a3,
     author = {A. A. Zorin},
     title = {On a relation between sphericity and weak symmetry of homogeneous spaces of reductive groups},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {14--18},
     year = {2005},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2005_4_a3/}
}