Proceedings of the International Symposium on Growing Media - Michael, J.C. (ISHS, 2008)
"ISHS Commission Plant Substrates and Soiless Culture, ISHS Working Group on Growing Media, IPS Commission II : Industrial Utilisation of Peat and Peatlands, for Energy, Horticulture, Environmental Protection and Other Purposes, IPS Working Group HOPE - Horticultural use of Peat"