References

BOUNDS ON THE BASE OF SOME PRIMITIVE NON-POWERFUL ZERO-SYMMETRIC SIGN PATTERN MATRICES


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[4] Bolian Liu and Lihua You, Bounds on the base of primitive nearly reducible sign pattern matrices, Linear Algebra Appl. 418 (2006), 863-881.

[5] Jia-Yu Shao, On the exponent of a primitive digraph, Linear Algebra Appl. 64 (1985), 21-31.

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[7] Lihua You, Jiayu Shao and Haiying Shan, Bounds on the basis of irreducible generalized sign pattern matrices, Linear Algebra Appl. 427 (2007), 285-300.