References
- Trends in Mathematics v.4 Weights of Idempotent Matrices L. B. Beasley;S. G. Lee;S. W. Park
- Liner Algebra and Its Appl. v.5 The Number of Idempotents in (0, 1)-Matrix Semigroups K. H. Kim
- Boolean Matrix Theory and Application K. H. Kim
- Comm. Korea Math. Soc. v.10 The Allowance of Idempotent of Sign Pattern Matrices S. G.Lee;S. W. Park
- Congressus Numerantium v.146 Idempotence of (1, 1)-Matrices S. W. Park;L. B. Beasley;S. G. Lee
- Korean J. Comput. & Appl. Math. v.7 no.2 Nonnegativity of Reducible Sign Idempotent Matrices S. W. Park;S. G. Lee;S. Z. Song