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International journal of mass spectrometry, 242 (2005) S. 203 - 209
...Becker, J. S....
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Journal of analytical atomic spectrometry, 19 (2004) 5, S. 675 - 680
...Becker, J. S....
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International journal of mass spectrometry, 232 (2004) S. 217 - 224
...Becker, J. S....
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