Scientific publications
"The use of MET-UD combined portable hardness testers for technological control"
Harteprufung 2006. Praxis, Trends and Innovationen", Berlin, November 2006
"Testing hardness of metal items with MET-UD combined portable hardness tester"
HARDMEKO 2004 - Hardness Measurement Theory and Application in Laboratories and Industries, 11-12 November, 2004, Washington, D.C., USA