Structure and properties of (Zr–Ti–Cr–Nb)N multielement superhard coatings - A. D. Pogrebnjak; B. A. Postolnyj; Ju. A. Kravchenko; A. P. Shipilenko; O. V. Sobol; V. M. Beresnev; A. P. Kuzmenko (Superhard Materials, 2015)