[1]
N. Goloshchapova and A. Ananieva, “On the extremal extensions of a non-negative Jacobi operator”, MFAT, vol. 19, no. 4, pp. 310–318, Dec. 2013, Accessed: Feb. 04, 2026. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/555