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"On minimal N+- rank graphs."
Mariana S. Escalante, M. S. Montelar, Graciela L. Nasini (2004)
- Mariana S. Escalante, M. S. Montelar, Graciela L. Nasini:
On minimal N+- rank graphs. Electron. Notes Discret. Math. 18: 109-114 (2004)
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