@article{VMUMM_2005_3_a3,
     author = {A. I. Aleksenko},
     title = {Critical values of sectional curvature on {Grassmann} manifolds},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {13--17},
     year = {2005},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2005_3_a3/}
}