An application of a polytope (4D-polyhedron) concept for the description of polymorphic transitions: Iron martensite and solid oxygen V.S. Kraposhin, M.N. Pankova, A.L. Talis et Yu.A. Freiman J. Phys. IV France, 112 (2003) 119-122 DOI: 10.1051/jp4:2003847