van Halteren, H.; Martell, C. H.; Caixia, D.; Gu, Y.; Kobben, J.; Panjaitan, L.; Schubotz, L.; Vasylenko, K.; Vladimirova, Y. Im Chattin :-) U Wanna NLP It: Analyzing Reduction in Chat. CLIN Journal 2011, 1, 95-108.