ELECTRONIC PROPERTIES OF PYROXENES NACRSI2 O6 AND NAFESI2 O6 ArticleStreltsov S.V., Kurmaev E.Z., Mcleod J., Moewes A., Redhammer G.J.Physical Review B: Condensed Matter and Materials Physics (с 1998 по 2015 год). Vol. 81. 2010. 045118 p..
