Non-existence of Cartesian groups of order 2 p m Ivan Studnička (1972) Commentationes Mathematicae Universitatis Carolinae
Non-Existence of Steiner Systems of Type S (d - 1, d, 2d). Edward F. jr. Assmus, M.T. Hermoso (1974) Mathematische Zeitschrift
Note on Dembowski' s Groups of Collineations. Ralph Hugh Francis Denniston (1968/1969) Mathematische Zeitschrift
Note on the theory of independence in continuous geometries Henry Francis Joseph Löwig (1975) Czechoslovak Mathematical Journal