[1]
Y. M. . Arlinsky, “Positive spaces of boundary values and sectorial expansions of nonnegative symmetric operator ”, Ukr. Mat. Zhurn., vol. 40, no. 1, pp. 8–14, Dec. 1987, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/9046