Extensions of Euler diagrams in Peirce's four manuscripts on logical graphsPietarinen, Ahti-VeikkoDiagrammatic Representation and Inference : 9th International Conference, Diagrams 2016, Philadelphia, PA, USA, August 7-10, 2016 : proceedings2016 / p. 139-154 : ill http://dx.doi.org/10.1007/978-3-319-42333-3_11 From Mitchell to Carus : fourteen years of logical graphs in the makingBellucci, Francesco; Pietarinen, Ahti-VeikkoTransactions of the Charles S. Peirce Society2016 / p. 539-575 http://dx.doi.org/10.2979/trancharpeirsoc.52.4.02 The beauty of graphsPietarinen, Ahti-VeikkoDiagrammatic Representation and Inference : 10th International Conference, Diagrams 2018, Edinburgh, UK, June 18–22, 2018 : proceedings2018 / p. 9-12 https://doi.org/10.1007/978-3-319-91376-6_2 Conference Proceedings at Scopus Article at Scopus Conference Proceedings at WOS Article at WOS