Logic diagrams : what Euler really did? [Online resource]Lemanski, Jens; Moktefi, AmiroucheHistoriae scientiarum Baltica 2017 : abstracts of the XXVIII International Baltic Conference on the History of Science : May 18-20, 2017, Tartu, Estonia2017 / p. 32-33 http://www.ester.ee/record=b4677628*est http://dspace.ut.ee/bitstream/handle/10062/56393/abstracts_2017.pdf?sequence=4&isAllowed=y