Nudel’man AA. Extension of the Stieltjes moment sequence to the left and related problems of the spectral theory of inhomogeneous string. Ukr. Mat. Zhurn. [Internet]. 2007Jun.25 [cited 2024Apr.28];59(6):815–825. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3347