Errata to the paper "Relations on lines as primitive notions for Euclidean geometry", Fundamenta Mathematicae 82 (1975), pp. 347-355
Euclidean superpythagorean geometry.
Finding an ellipse tangent to finitely many given lines.
Galilean plane with commutative and nonlinear geometry.
Generation and recovery of highway lanes.
Geometrie der Ebene (Planimetrie) [Book]
Geraden-Abbildungen, die den Flächeninhalt 1 von Dreiecken erhalten.
Hausdorffův-Banachův-Tarského paradox
How many clouds cover the plane?
The plane can be covered by n + 2 clouds iff .
How round is a circle? Constructions of double and circular planar near-rings.
Imaginární elementy v geometrii [Book]
Isoperimetrische Ungleichung für geschlossene Raumsechsecke
Klassifikation ebener Dreiecke nach Abstandsrelationen
Koordinatensystem-invariante Ausgleichskegelschnitte
Le chasseur perdu dans la foret.
Lineare Geradenkomplexe im Flaggenraum I3 (2).
Lower levels of Euclidean planes.
Mappings preserving regular hexahedrons.
Mappings which preserve regular dodecahedrons.
Mehrdimensionales Analogon zu den Sätzen von Menelaos und Ceva