Completeness of the system of root vectors of operators in a space with indefinite metric
T. Ya. Azizov

This publication is cited in the following articles:

1. Yury Shestopalov, Yury Smirnov, “Eigenwaves in waveguides with dielectric inclusions: spectrum”, Applicable Analysis, 93:2 (2014), 408  
2. T. Ya. Azizov, Linear Operators in Function Spaces, 1990, 111