[1] |
(1) Gardner W.S. and Mtnzel D.W., 1974, Geochim. Cosmochim. Acta, V.38, p.813-822 (2) Hedges J.1. and Mann D.C., 1979, Geochim. Cosmochim. Acta, V.43, p.1803-1807. (3) Hedges J.I. and Ertel J.R.,1982, Anal. Chcm., V.54, p.174-178. (4) Hedges J.L, Clark W.A. and Cowie G.L.. 1988, Limnol. Oceanogr., V.33, p.1137-1152 (5) Leo R.F. and Barghoorn E.S., 1970, Science, V.168, p.582-584 (6) Pepper, J.M. and Flemming R.W., 1978, Can. J. Chem.. V.56, p.896-898. (7) Stevenson F.J., 1982, Humus Chemistry'. John Wiley & Sons. New York p.204. |