1.
Zolotarev VA. Direct and inverse problems for finite-dimensional perturbations of operators . Dopov. Nac. akad. nauk Ukr. [Internet]. 2015 Jan. 28 [cited 2026 Jun. 20];(1):7-12. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/12908