A new stable organic metal: K-(BETS)2C(CN)3. The first K-type radical cation salt with a planar-triangular discrete organic anion
B. Zh. Narymbetov, N. D. Kushch, L. V. Zorina, S. S. Khasanov, R. P. Shibaeva, T. G. Togonidze, A. E. Kovalev, M. V. Kartsovnik, L. I. Buravov, E. B. Yagubskii, E. Canadell, A. Kobayashi and H. Kobayashi