Citation: Sa. Stepin, ON THE SPECTRAL PROPERTIES OF THE NON-SELF-CONJUGATE OPERATOR I-EPSILON-D(2) DX(2)+Q(X)/, Russian Mathematical Surveys, 53(3), 1998, pp. 639-641
Citation: Sa. Stepin, NONSELF-ADJOINT SINGULAR PERTURBATIONS AND SPECTRAL PROPERTIES OF THEORR-SOMMERFELD BOUNDARY-VALUE PROBLEM, Sbornik. Mathematics, 188(1-2), 1997, pp. 137-156
Citation: Sa. Stepin, NON-SELF-CONJUGATE SINGULAR PERTURBATIONS - A MODEL OF TRANSITION FROM A DISCRETE TO A CONTINUOUS-SPECTRUM, Russian Mathematical Surveys, 50(6), 1995, pp. 1311-1313
Citation: Sa. Stepin, SPECTRUM AND COMPLETENESS OF NATURAL OSCILLATIONS OF THE ATMOSPHERE WITH TEMPERATURE STRATIFICATION, Sbornik. Mathematics, 79(1), 1994, pp. 179-190
Citation: Sa. Stepin, SPECTRUM AND COMPLETENESS OF NATURAL OSCILLATIONS OF THE ATMOSPHERE WITH TEMPERATURE STRATIFICATION, Sbornik. Mathematics, 79(1), 1994, pp. 179-190