@article{VTGU_2016_4_a4,
     author = {Ya. V. Slavolyubova},
     title = {Associated contact metric structures on the $7$-dimensional unit sphere~$S^7$},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {44--57},
     publisher = {mathdoc},
     number = {4},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2016_4_a4/}
}