Resonantly enhanced degenerate four-wave mixing of millimeter wave radiation in gas / N.A.Bogatov,M.S.Gitlin,A.G.Litvak и др., 1992. - 14 p. - Текст : непосредственный.
Богатов Н.А. Degenerate four-wave mixing in plasma of a non-self-sustained disharge in the beams of MM electromagnetic waves / Н. А. Богатов, M. S. Gitlin, S. V. Golubev, 1991. - 25 p. - Текст : непосредственный.