by Chernozatonskii, L.A., Gulyaev, Yu.V., Kosakovskaja, Z.Ja, Sinitsyn, N.I., Torgashov, G.V., Zakharchenko, Yu.F., Fedorov, E.A., Val'chuk, V.P.
Published in Chemical physics letters (03.02.1995)

by Chernozatonskii, L.A., Val'chuk, V.P., Kiselev, N.A., Lebedev, O.I., Ormont, A.B., Zakharov, D.N.
Published in Carbon (New York) (1997)

by Val'chuk, V.P., Ormont, A.B., Chernozatonskii, L.A.
Published in Physics letters. A (17.04.1995)