Existential graphs as an instrument of logical analysis : part I. AlphaBellucci, Francesco; Pietarinen, Ahti-VeikkoThe review of symbolic logic2016 / p. 209-237 : ill https://doi.org/10.1017/S1755020315000362 Peirce's calculi for classical propositional logicMa, Minghui; Pietarinen, Ahti-VeikkoThe review of symbolic logic2020 / p. 509 - 540 https://doi.org/10.1017/S1755020318000187 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS