Search results
Journal of Computer and System Sciences > 2012 > 78 > 4 > 1045-1098
Information and Computation > 2010 > 208 > 5 > 521-544
Information Processing Letters > 2010 > 110 > 4 > 143-147
Journal of Computer and System Sciences > 2009 > 75 > 6 > 336-358