برخی از مقالات پروفسور هلموت کارتسل
Classificatioon of General Absolute Geometries
Co-Minkowski spaces, their refection structure and K-loops
Webs with Rotation and Reflection Properties and their Relations with Certain Loops
Automorphisms of Symmetric and Double Symmetric Chain Structures
Binary operations derived from symmetric permutation sets and applications to absolute geometry
Left Loops, Bipartite Graphs with Parallelism and Bipartite Involution Sets
Webs Related to K-Loops and Reflection Structures
K-loops derived from Frobenius groups
Polar Graphs and Corresponding Involution Sets, Loops and Steiner Triple Systems
Vectorspacelike representation of absolute planes
Legendre-like Theorems in a General Absolute Geometry
The defect in an invariant reflection structure
