1. Spectral stability of the Neumann Laplacian;Burenkov;J. Differential Equations,2002
2. Spectral stability of non-negative self-adjoint operators;Burenkov;Dokl. Ross. Akad. Nauk Math.,2005
3. Spectral stability of general non-negative self-adjoint operators with applications to Neumann-type operators;Burenkov;J. Differential Equations,2007
4. Spectral stability of elliptic selfadjoint differential operators with Dirichlet and Neumann boundary conditions;Burenkov,2006
5. Spectral stability of nonnegative selfadjoint operators;Burenkov,2006