Bulatov, A., & Jeavons, P. (2000). Tractable constraints closed under a binary operation. Oxford University Computing Laboratory.
芝加哥风格引文Bulatov, A., 与 P. Jeavons. Tractable Constraints Closed Under a Binary Operation. Oxford University Computing Laboratory, 2000.
MLA引文Bulatov, A., 与 P. Jeavons. Tractable Constraints Closed Under a Binary Operation. Oxford University Computing Laboratory, 2000.
警告：这些引文格式不一定是100％准确.