1. A preliminary Red Data List of macrofungi in The Netherlands;Arnolds;Persoonia,1989
2. Decline of ectomycorrhizal fungi in Europe;Arnolds;Agric. Ecosyst. & Environ.,1991
3. The analysis and classification of fungal communities with special reference to macrofungi
4. Baar, J. 1995. Ectomycorrhizal fungi of Scots pine as affected by litter and humus.. Ph.D. thesis. Agricultural University Wageningen.