A. Laptev, O. Safronov, and T. Weidl. Nonlinear problems in mathematical physics and related topics, I, volume 1 of Int. Math. Ser. (N. Y.), Kluwer/Plenum, New York, (2002)
A. Laptev, O. Safronov, and T. Weidl. Nonlinear problems in mathematical physics and related topics, I, volume 1 of Int. Math. Ser. (N. Y.), Kluwer/Plenum, New York, (2002)