Sklyar GM, Marchenko VA. Hardy inequality and the construction of the generator of a C0-group with eigenvectors not forming a basis . Dopov. Nac. akad. nauk Ukr. [Internet]. 2015 Sep. 28 [cited 2026 Jun. 20];(9):13-7. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/15210