Matthew Chu Sampath Kannan Andrew McGregor Checking and Spot-Checking the Correctness of Priority Queues. 728-739 2007 conf/icalp/2007 ICALP http://dx.doi.org/10.1007/978-3-540-73420-8_63 db/conf/icalp/icalp2007.html#ChuKM07