Llavona, José G.2023-06-202023-06-2019971560-5159https://hdl.handle.net/20.500.14352/58844The First International School "Functional Analysis, Differential Equations and Their Application" Puebla (Mexico), May 18--23, 1995rusjournal articlehttp://mi.mathnet.ru/eng/fpm204http://www.mathnet.ru/open access517Análisis matemático1202 Análisis y Análisis Funcional