By Figueiredo Frederico   Jorge Joaquim   Hanisch Frank   Case Colleen   in International Journal of Web Based Communities

ISSN:1477-8394|6|1|62-75

Inderscience Publishers‎(2009)‎

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By Demetriadis Stavros   Egerter Tina   Hanisch Frank   Fischer Frank   in Computer Science Education

ISSN:0899-3408|21|1|29-56

Routledge Ltd‎(2011)‎

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