2011, Article in monograph or in proceedings (Wisdom, R.; Vohla, C. (ed.), After Wise Use – The Future of Peatlands, Proceedings of the 13th International Peat Congress: Pristine Mire Landscapes, pp. 92-94)
2009, Contribution for newspaper or weekly magazine (Science for Environment Policy - European Commission DG Environment News Alert, 7 mei 2009, pp. 1)
2009, Article in monograph or in proceedings (Mander, U.; Koiv, M.; Vohla, C. (ed.), 2nd International symposium on Wetland Pollutant Dynamics and Control WETPOL 2007, pp. 329-331)
2008, Article in monograph or in proceedings (After wise use : the future of peatlands : Proceedings of the 13th International Peat Congress Pristine Mire Landscapes, pp. 92-94)