A system of exponential functions with shift and the Kostyuchenko problem. Bilalov, B.T. — 2009 Sibirskij Matematicheskij Zhurnal
The basis properties of power systems in L p . Bilalov, B.T. — 2006 Sibirskij Matematicheskij Zhurnal
Basis properties of some systems of exponential functions, cosines, and sines. Bilalov, B.T. — 2004 Sibirskij Matematicheskij Zhurnal