By Bersons I.   Veilande R.   in Applied Physics B

ISSN:0946-2171|78|7-8|807-808

Springer Publishing Company ‎(2004)‎

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By Bersons I   Veilande R   Pirktinsh A   in Physica Scripta

ISSN:1402-4896|89|4|45102-45106

IOP Publishing‎(2014)‎

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