1. A. S. Lyskova, “On the Schrödinger operator in magnetic fields,”Usp. Mat. Nauk,36, 189–190 (1981).
2. V. M. Manuilov, “On theK o -group of a continuous family of algebrasA ϱ,”Usp. Mat. Nauk,44, No. 3, 163–164 (1989).
3. V. M. Manuilov, “On eigenvalues of a perturbed Schrödinger operator in a magnetic field with irrational magnetic flow,”Funkts. Anal. Prilozh.,28, 57–60 (1994).
4. V. M. Manuilov, “Diagonalization of compact operators in Hilbert modules overW *-algebras of finite type,”Usp. Mat. Nauk,49, No. 2, 159–160 (1994).
5. A. T. Fomenko and D. B. Fuks,A Course of Homotopy Topology [in Russian], Moscow (1989).