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"Quasi-symmetric 2-(31, 7, 7) designs and a revision of Hamada's conjecture."
Vladimir D. Tonchev (1986)
- Vladimir D. Tonchev
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Quasi-symmetric 2-(31, 7, 7) designs and a revision of Hamada's conjecture. J. Comb. Theory A 42(1): 104-110 (1986)
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