references in English, Propositional logic
Propositional logic in other texts. The notation may not follow exactly the one we are using.
[WBOOK] Discrete Mathematics/Logic, Logic Page 2 (up to Predicate Logic, excluded)
[VK_DSLN] 37-42, 11-13
[KB_DMCSS] 83-95, 108-115
The bracket expressions refer to References in English main page.