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 : illhttps://artiklid.elnet.ee/record=b2658863*est