Kuz AM, Ptashnik BI. A problem with integral conditions with respect to time for Garding hyperbolic equations. Ukr. Mat. Zhurn. [Internet]. 2013 Feb. 25 [cited 2025 Dec. 5];65(2):252-65. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2416