By Rouet J-f.   Dillenbourg P.   Steffens K.   van Oostendorp H.   in Instructional Science

ISSN:0020-4277|27|3|197-199

Springer Publishing Company ‎(1999)‎

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By Jahn T.   Steffens K.-J.   in Drug Development and Industrial Pharmacy

ISSN:0363-9045|31|10|951-957

Informa Healthcare‎(2005)‎

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By Gutermann M   Slowik V   Steffens K   in Insight - Non-Destructive Testing and Condition Monitoring

ISSN:1354-2575|45|12|805-808

The British Institute of Non-Destructive Testing‎(2003)‎

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By Dwyer K J   Pomeroy J M   Simons D S   Steffens K L   Lau J W   in Journal of Physics D: Applied Physics

ISSN:0022-3727|47|34|345105-345110

IOP Publishing‎(2014)‎

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