By Demčenko A   Žukauskas E   Mažeika L   Kažys R   in Insight - Non-Destructive Testing and Condition Monitoring

ISSN:1354-2575|47|3|163-167

The British Institute of Non-Destructive Testing‎(2005)‎

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By Kažys R.   Mažeika L.   in Acta Acustica united with Acustica

ISSN:1610-1928|73|3|153-157

S. Hirzel Verlag‎(1991)‎

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