참고문헌
- Linear Algebra Appl v.208;209 Sign-Central Matrices T.Ando;R.A.Bruadi
- Linear Algebra Appl. v.212;213 Linear Transformations that Preserve the Assignment L. B. Beasley;G. Y. Lee;S. G. Lee
- Proc. Royal Irish Acad. v.91A Linear operators that preserve term rank 1 L. B. Beasley;N. J. Pullman
- Linear Algebra Appl. v.217 Linear opertors which Preserve Sign-nonsingular Matrices L. B. Beasley;Shumin Ye
- Linear Multilinear Alg v.29 Sign pattern that Requaire Real, Normal of Pure imaginary Eigenvalues C. A. Eschenbach;C. R. Johnsin