SPECTRAL THEORY OF FRACTIONAL ORDER INTEGRATION OPERATORS, THEIR DIRECT SUMS, AND SIMILARITY PROBLEM TO THESE OPERATORS OF THEIR WEAK PERTURBATIONS ArticleMalamud Mark M.Handbook of fractional calculus with applications. Vol. 1. 2019. P.. 427-460
PROCEEDINGS OF THE JANGJEON MATHEMATICAL SOCIETY. MEMOIRS OF THE JANGJEON MATHEMATICAL SOCIETY Journal
