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Additional information
The present paper was originated by discussions between the authors whileJ. Cofman was Visiting Professor of the C.N.R. (Consiglio Nazionale delle Ricerche) at the University of Perugia. The authors wish to express their thanks to the C.N.R. for the opportunity they had to do this work.
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Barlotti, A., Cofman, J. Finite Sperner spaces constructed from projective and affine spaces. Abh.Math.Semin.Univ.Hambg. 40, 231–241 (1974). https://doi.org/10.1007/BF02993602
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DOI: https://doi.org/10.1007/BF02993602