Projective planes with collineation groups sharply transitive on quadrangles
Demonstration of the theorem: Let \({\mathcal P}\) be a projective plane and G a group of collineations acting sharply transitively on the set of ordered quadrangles in \({\mathcal P}\). Then \({\mathcal P}={\mathcal P}(F)\) is Pappian.
collineations acting sharply transitively
scientific article; zbMATH DE number 3905326