1.
Gorbachuk VI, Gorbachuk ML. Behavior of the extended spectral measure of a self-adjoint operator at infinity. Ukr. Mat. Zhurn. [Internet]. 1997Apr.25 [cited 2024Nov.24];49(4):510–516. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5024