@article{Dudkin_2002, title={Analog of the Krein Formula for Resolvents of Normal Extensions of a Prenormal Operator}, volume={54}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/4092}, abstractNote={We prove a formula that relates resolvents of normal operators that are extensions of a certain prenormal operator. This formula is an analog of the Krein formula for resolvents of self-adjoint extensions of a symmetric operator. We describe properties of the defect subspaces of a prenormal operator.}, number={4}, journal={Ukrainsâ€™kyi Matematychnyi Zhurnal}, author={DudkinM. Ye.}, year={2002}, month={Apr.}, pages={555-562} }