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ISSN:0017-6192|52|10|891-896

Springer Publishing Company ‎(2004)‎

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ISSN:0017-6192|55|1|29-35

Springer Publishing Company ‎(2007)‎

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By Helbig M.   Kahla-Witzsch H.   Helbig S.   Knecht R.   Gstöttner W.   in HNO

ISSN:0017-6192|54|12|922-928

Springer Publishing Company ‎(2006)‎

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