Prof. M. Mihovski
Institute of Mechanics Bulgarian Academy of Sciences
“Acad. G. Bonchev” Str., bl. 4
1113 Sofia BULGARIA
Phone: (+359 2) 979 64 45 (+359 2) 979 71 20 Mob. (+359 89) 9443892
Fax: (+359 2) 870 74 98 (+359 2) 979 71 20
e-mail: nntdd@abv.bg, nntdd@imbm.bas.bg web site: www.mech-ing.com/ndt