Investigations of E-Learning Patterns‎

By Christian Kohls   Joachim Wedekind  

ISBN:9781609601461

IGI Global‎(2010)‎

Access to resources Favorite 14.284439

By Hellwig Christian   Kohls Sebastian   Veldkamp Laura   in The American Economic Review

ISSN:0002-8282|102|3|35-40

American Economic Association‎(2012)‎

Access to resources Favorite 10.713329