2 citations to https://www.mathnet.ru/eng/vmumm4032

1. E. I. Yakovlev, “Bundles and Geometric Structures Associated With Gyroscopic Systems”, Journal of Mathematical Sciences, 153:6 (2008), 828–855          
2. E. I. Yakovlev, “Geodesic Modeling and Solvability Conditions for a Two-End Problem for Multivalued Functionals”, Funct. Anal. Appl., 30:1 (1996), 68–70