Kasyanov PO, Mel'nik VS. On properties of subdifferential mappings in Fréchet spaces. Ukr. Mat. Zhurn. [Internet]. 2005 Oct. 25 [cited 2025 Dec. 6];57(10):1385–1394. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3692