Bases in incidence structures defined on projective spaces
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Vladimír Slezák (1998)
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
T.M.K. Davison (1987)
Aequationes mathematicae
M.A. Ronan, J. Tits (1987)
Mathematische Annalen
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