1. On the defect of noncontractive operators in Kreın spaces: a new formula and some applications;Azizov,1998
2. Some applications of the theory of operators in Krein spaces to the solvability of nonlinear Hamiltonian systems;Azizov;Mat. Zametki,1991
3. On selfadjoint operators associated with inequalities and applications to problems in mathematical physics;Azizov;Mat. Zametki,1994
4. Foundation of the Theory of Linear Operators in Spaces with an Indefinite Metric;Azizov,1986
5. A minimax theory for overdamped networks;Duffin;J. Rational Mech. Anal.,1955