Comparative investigation of NbN and Nb–Si–N films: experiment and theory - V. I. Ivashchenko; P. L. Scrynskyy; O. S. Lytvyn; O. O. Butenko; O. K. Sinelnichenko; L. Gorb; F. Hill; J. Leszczynski; A. O. Kozak (Superhard Materials, 2014)