On δ -homogeneous Riemannian manifolds. II. Berestovskij, V.N.; Nikonorov, Yu.G. — 2009 Sibirskij Matematicheskij Zhurnal
Killing vector fields of constant length on Riemannian manifolds. Berestovskij, V.N.; Nikonorov, Yu.G. — 2008 Sibirskij Matematicheskij Zhurnal
Shapes of spheres of special nonholonomic left-invariant intrinsic metrics on some Lie groups. Berestovskij, V.N.; Zubareva, I.A. — 2001 Sibirskij Matematicheskij Zhurnal