@article{MZM_2011_90_5_a12,
     author = {D. V. Egorov},
     title = {QR-Submanifolds and {Riemannian} {Metrics} with {Holonomy} $G_2$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {781--784},
     publisher = {mathdoc},
     volume = {90},
     number = {5},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2011_90_5_a12/}
}