Zhivkov A I

Publications in Math-Net.Ru

1. Geometry of invariant manifolds of a gyroscope in the field of a quadratic potential
   
   Izv. Akad. Nauk SSSR Ser. Mat., 54:4 (1990),  879–893
2. Isospectral classes of matrix-valued finite-gap operators with symmetries
   
   Uspekhi Mat. Nauk, 44:1(265) (1989),  197–198