Andrej Brodnik Svante Carlsson Michael L. Fredman Johan Karlsson J. Ian Munro Worst case constant time priority queue. 249-256 2005 78 Journal of Systems and Software 3 http://dx.doi.org/10.1016/j.jss.2004.09.002 db/journals/jss/jss78.html#BrodnikCFKM05