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"Quasi-symmetric 2, 3. 4-designs."
Sharad S. Sane, Mohan S. Shrikhande (1987)
- Sharad S. Sane, Mohan S. Shrikhande:
Quasi-symmetric 2, 3. 4-designs. Comb. 7(3): 291-301 (1987)
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