References
- Gyires , B. 1976 . On permanent inequalities . Coll. Math. Soc. J. Bolyai , 18 Combinatorics
- Marcus , M. and Mine , H. 1965 . Permanents . Amer. Math. Monthly , 72 : 577 – 591 .
- Marcus , M. and Newman , M. 1962 . Permanent functions . Ann. Math. , 75 : 45 – 62 .