Christoforos Anagnostopoulos Dimitris K. Tasoulis David J. Hand Niall M. Adams Online optimization for variable selection in data streams. 132-136 2008 ECAI http://dx.doi.org/10.3233/978-1-58603-891-5-132 conf/ecai/2008 db/conf/ecai/ecai2008.html#AnagnostopoulosTHA08