• Existential graphs: history and interpretationBellucci, Francesco; Pietarinen, Ahti-VeikkoOxford Handbook for Charles S. Peirce2024 / p. 240-260 https://doi.org/10.1093/oxfordhb/9780197548561.013.16 https://www.scopus.com/pages/publications/85198576970?origin=resultslis