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"Conference Matrices from Projective Planes of Order 9."
Cor A. J. Hurkens, J. J. Seidel (1985)
- Cor A. J. Hurkens, J. J. Seidel:
Conference Matrices from Projective Planes of Order 9. Eur. J. Comb. 6(1): 49-57 (1985)
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