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  • Methods Archived September 4, 2013, at the Wayback Machine Broll, W.; Ohlenburg, J.; Lindt, I.; Herbst, I.; Braun, A. K. (2006). "Meeting technology challenges...
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  • 1007/978-3-319-17632-1. ISBN 978-3-319-17631-4. S2CID 19479793. Broll, W.; Ohlenburg, J.; Lindt, I.; Herbst, I.; Braun, A. K. (2006). "Meeting technology challenges...
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