PTÁK, V. Some Open Mapping Theorems in LF-Spaces and their Application to Existence Theorems for Convolution Equations. MATHEMATICA SCANDINAVICA, [S. l.], v. 16, p. 75–93, 1965. DOI: 10.7146/math.scand.a-10749. Disponível em: https://www.mscand.dk/article/view/10749. Acesso em: 5 may. 2024.