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51Axx Linear incidence geometry (4 articles)

• Havel, Václav: One generalization of the fourth harmonic point (Preliminary communication). (English). Commentationes Mathematicae Universitatis Carolinae, vol. 8 (1967), issue 3, pp. 463-467
• Havel, Václav: Freie Erweiterungen von Schemen $n$-ten Grades. (German) [Free extensions of schemas of $n$-th degree]. Commentationes Mathematicae Universitatis Carolinae, vol. 6 (1965), issue 4, pp. 443-448
• Stanilov, Grozó: Геодезическая нормаль к поверхности в $P_3$. (Russian) [The geodesic normal to a surface in $P_3$]. Commentationes Mathematicae Universitatis Carolinae, vol. 5 (1964), issue 1, pp. 33-36
• Stanilov, Grozó: К биaкcиaльнoй тeopии кoнгpуэнции пpямыx. (Russian) [On the bi-axial theory of a congruence of lines]. Commentationes Mathematicae Universitatis Carolinae, vol. 4 (1963), issue 3, pp. 117-120