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Proceedings of the IEEE > 2009 > 97 > 7 > 1159 - 1160
IEEE Software > 2009 > 26 > 1 > 20 - 21
IEEE Transactions on Professional Communication > 2008 > 51 > 3 > 302 - 312
Educational Studies in Mathematics > 2008 > 68 > 2 > 99-111
Zeitschrift für Rheumatologie > 2004 > 63 > 3 > 216-222