Tongov, Manahil, <p class="Author">Department of Material Sscience and Technology, Technical University of Sofia<em><br /></em><em><br /> </em>Center of Welding, IMSETCHA “Acad. A. Balevski” Bulgarian Academy of Sciences</p>, Bulgaria



ERDF co-funded project "Funding of international projects in research and innovation at Rezekne Academy of Technologies" No. 1.1.1.5/18/I/012