• PrefaceFischer, Bernd; Uustalu, TarmoTheoretical Aspects of Computing - ICTAC 2018 : 15th International Colloquium, Stellenbosch, South Africa, October 16-19, 2018 : proceedings2018 / p. V-VI https://link.springer.com/content/pdf/bfm%3A978-3-030-02508-3%2F1.pdf https://www.ester.ee/record=b5174218*est https://doi.org/10.1007/978-3-030-02508-3 https://www.scopus.com/sourceid/25674 https://www.scopus.com/record/display.uri?eid=2-s2.0-85055428657&origin=inward&txGid=1772b379ca6ff8fc060161d53d916b17
• Theoretical Aspects of Computing - ICTAC 2018 : 15th International Colloquium, Stellenbosch, South Africa, October 16-19, 2018 : proceedings2018 https://www.ester.ee/record=b5174218*est http://doi.org/10.1007/978-3-030-02508-3