Author Robert D. Delia , and German Eyptologist Karl Jansen - Winkeln have investigated Obsomer 's work and have concluded in favour of co-regencies .
The French Egypyologist Claude Obsomer wholly rejects the possibility of co-regencies in the Twelfth Dynasty .
Author Robert D. Delia , and German Eyptologist Karl Jansen - Winkeln have investigated Claude Obsomer 's work and have concluded in favour of co-regencies .
The French Egypyologist Claude Obsomer wholly rejects the possibility of co-regencies in the Twelfth Dynasty .