A. S. MarkusBooksTheory of Commuting Nonselfadjoint OperatorsTheory of commuting nonselfadjoint operatorsDifferent︠s︡ialʹnye uravnenii︠a︡ i teorii︠a︡ operatorovVvedenie v spektralʹnui͡u︡ teorii͡u︡ polinomialʹnykh operatornykh puchkovIntroduction to the spectral theory of polynomial operator pencilsAuthor data: Open Library
