Concept formation in exploratory data analysis : case studies of linguistic and banking data = Mõiste moodustamine uurivas andmeanalüüsis: keele- ja pangandusandmete juhtumianalüüsidKirt, Toomas2007 https://www.ester.ee/record=b2324671*est

Concept maps as a tool for engineering educationRaud, Zoja; Lehtla, Tõnu13th International Symposium "Topical Problems in the Field of Electrical and Power Engineering." Doctoral School of Energy and Geotechnology II : Pärnu, Estonia, January 14-19, 20132013 / p. 31-36 : ill

Concept maps for teaching, learning, and assessment in electronicsVodovozov, Valery; Raud, ZojaEducation research international2015 / p. 1-9 : ill https://doi.org/10.1155/2015/849678

Concept maps in Power Electronics education [Electronic resource]Raud, Zoja; Vodovozov, Valery; Lehtla, TõnuCPE 2013 : 2013 International Conference on Compatibility and Power Electronics (CPE) : June 5-7, 2013, Ljubljana, Slovenia : conference proceedings2013 / p. 280-285 : ill [CD-ROM]