On weak rotors, Latin squares, linear algebraic representations, invariant differentials and cryptanalysis of Enigma / Nicolas T. Courtois, Marek Grajek and Michal Rams
On weak rotors,  Latin  squares,  linear algebraic  representations, invariant differentials  and cryptanalysis of Enigma / Nicolas T. Courtois, Marek Grajek and  Michal Rams