Hessen D. O.Food webs and carbon cycling in humic lakes // Aquatic humus substances / D.O Hessen, L.J. Tranvik (Eds.) Springer-Verlag, Berlin Heidelberg, 1998, p. 287 - 315.
M?nster U., De Haan H.The role of microbial extracellular enzymes in the transformation of dissolved organic matter in humic waters // Aquatic humus substances / D.O Hessen, L.J. Tranvik (Eds.) Springer-Verlag, Berlin Heidelberg, 1998, p. 199 - 257.
McKnight D. M., Aiken G. R.Sources and age of aquatic humus // Aquatic humus substances / D.O Hessen, L.J. Tranvik (Eds.) Springer-Verlag, Berlin Heidelberg, 1998, p. 9 - 39.
Bertilsson S., Tranvik L.Photochemically produced carboxilic acids as substrates for freshwater bacterioplankton // Limnol. Oceanogr., 1998, v. 43, p. 885 - 895.