By Lehtonen J.   Mikkonen R.   Perala R.   in Physica C

ISSN:0921-4534|401|1|151-154

Elsevier‎(2004)‎

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By Mikkonen R.   Vehmas T.   Granlund H.   Kivisaari L.   in Acta Radiologica

ISSN:0284-1851|41|4|390-393

Blackwell Publishing‎(2000)‎

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