Eigenvalue asymptotics for the Schrödinger operator with perturbed periodic potential. G.D. Raikov — 1992 Inventiones mathematicae
Eigenvalue asymptotics for the Dirac operator in strong constant magnetic fields. Raikov, G.D. — 1999 Mathematical Physics Electronic Journal [electronic only]
Asymptotic properties of the magnetic integrated density of states. Raikov, G.D. — 1999 Electronic Journal of Differential Equations (EJDE) [electronic only]