Media type: E-Article Title: Naoto Yonemitsu. On systems of strict implication. Tôhoku mathematical journal, ser. 2 vol. 3 (1951), pp. 48–58 Contributor: Halldén, Sören imprint: Cambridge University Press (CUP), 1951 Published in: Journal of Symbolic Logic Language: English DOI: 10.1017/s0022481200100787 ISSN: 0022-4812; 1943-5886 Keywords: Logic ; Philosophy Origination: Footnote: