Knuth，DonaldE. The Art of Computer Programming，Volume 2:Seminumerical Algorithms .3rd ed.Boston: Addison-Wesley，1998. PPiEOAPVbzNCafSVD6rHDTKMJJA/aGJ1QAihCC6hW/c8Edwp/Dl3+Dncin2NVPf2
