1. Bambalov, N., Clarke, D., Tomson, A., and Sokolov, G., Proc. 13th Int. Peat Congress, Tullamore, 2008, vol. 1, p. 316.
2. Rakovskii, V.E. and Pigulevskaya, L.V., Khimiya i genezis torfa (Peat Chemistry and Genesia), Moscow: Nedra, 1978.
3. Rakovskii, V.E., Khimiya i genezis tverdykh goryuchikh iskopaemykh (Chemistry and Genesis of Fossil Solid Fuels), Moscow: Izd. Akad. Nauk SSSR, 1953.
4. Bambalov, N.N., Prirodnye Resursy (Minsk), 2005, no. 1, p. 44.
5. Bambalov, N.N., Prirodnye Resursy (Minsk), 2006, no. 2, p. 40.