BALTGRAF - 20th jubileeMägi, ReinEngineering Graphics BALTGRAF-11 : proceedings of the Eleventh International Conference : Tallinn, Estonia, June 9-10, 20112011 / p. 9-14 : ill Engineering graphics - history or futurity?Mägi, ReinScientific proceedings of Riga Technical University. 8. serija, The humanities and social science2004 / p. 115-122 : ill Engineering graphics and humorMägi, ReinScientific proceedings of the 12th International Conference on Engineering Graphics BALTGRAF 2013 : June 5-7, Riga, Latvia2013 / p. 141/300-148/300 : ill Engineering graphics education as the foundation of intercultural engineering communicationLille, Harri; Ruus, AimeScientific proceedings of the 12th International Conference on Engineering Graphics BALTGRAF 2013 : June 5-7, Riga, Latvia2013 / p. 135/300-140/300 : ill Forms used for graphic representation of an object in engineering graphics [Online resource]Lille, Harri; Ruus, AimeScientific proceedings of the 13th International Conference on Engineering Graphics BALTGRAF-13 : June 25-26, 2015, Vilnius2015 / p. 58-61 : ill http://doi.org/10.3846/baltgraf.2015.011 http://www.ester.ee/record=b4512767*est https://digi.lib.ttu.ee/i/?3151 On the concepts of representation and communication in the course of engineering graphicsLille, Harri; Ruus, AimeJoint conference "Teaching mathematics : retrospective and perspectives" : 13th International Conference and 8th Nordic-Baltic Conference "Agrometrics" : 30 May - 1 June 2012 Tartu, Estonia : proceedings2012 / p. 167-176 : ill https://artiklid.elnet.ee/record=b2658863*est Representation of an object as a semiotic sign in engineeringLille, Harri; Ruus, AimeICGG 2018 - proceedings of the 18th International Conference on Geometryand Graphics : 40th Anniversary-Milan, Italy, August 3–7, 20182019 / p. 2201-2204 https://doi.org/10.1007/978-3-319-95588-9_202 Conference proceedings at Scopus Article at Scopus