1. ANDREJKO M. J. and COHEN A. D. (1984) Contributions of ash and silica from the major peat-producing plants in the Okefenokee swamp-marsh complex. In The Okefenokee Swamp, ed. A. D. Cohen, D. J. Casagrande, M. J. Andrejko and G. R. Best, Wetland Surveys, Los Alamos, N.M., pp. 575–592.
2. AVERINA N.G. and POLIKARPOVA N. N. (1981) Plant pigments in peat. Vestsi Akad Navuk BSSR Ser. Khim. Navuk [1] 102–106. Chem. Abs. 1981, 95 no. 9689.
3. BODZEK D. and MARZEC A. (1981) Molecular components of coal and coal structure. Fuel, 60, 47–51.
4. BOON J.J., DUPONT L., van der HAMMER, T. and de LEEUW J.W. (1986) Characterization of a peat bog profile by Curie-point pyrolysis/mass spectrometry combined with multivariate analysis and by pyrolysis/gas chromatography/mass spectrometry. In Peat and Water. Aspects of Water Retention and Dewatering in Peat, ed. C. Fuchsmann, Elsevier, Amsterdam.
5. BOOH J.J., van SMEERDIJK D. and STOUT S.A. (1987) Characterization of recent and fossil plant tissues by on-line pyrolysis/high resolution gas chromatography/LR and HR mass spectrometry and microscopic techniques. Abstracts, 13th International Meeting on Organic Geochemistry, pp. 286–287.