Kerstin Borau Carsten Ullrich Jinjin Feng Ruimin Shen Microblogging for Language Learning: Using Twitter to Train Communicative and Cultural Competence. 78-87 2009 ICWL http://dx.doi.org/10.1007/978-3-642-03426-8_10 conf/icwl/2009 db/conf/icwl/icwl2009.html#BorauUFS09