Assonova Nadezhda Vladimirovna

Publications in Math-Net.Ru

1. Hilbert and Bessel Properties of Systems of Root Functions of $2m$th-Order Operators
   
   Differ. Uravn., 37:3 (2001),  299–309
2. The Hilbert and Bessel properties of systems of eigenfunctions of second-order operators
   
   Differ. Uravn., 36:2 (2000),  147–151