Grossschmidt, Gunnar : [biographical data]Who's Who in the world 2000 : Millennium edition. 17th edition1999 / p. 816 [Krunks, Malle]Who's Who in the World 2009. 26th Edition2008 / p. 1467 Who's who in science and engineering 2005-20062004 https://www.ester.ee/record=b2012735*est