1. Agerer, R., and I. Kottke, 1981. Sozio-ökologische Studien in Fichten-und Eichen-BuchenHainbuchen-Wäldern im Naturpark Schönbuch. Z. Mykol. 47:103–122.
2. Al Abras, K., I. Bilger, F. Martin, F. Le Tacon, and F. Lapeyrie. 1988. Morphological and physiological changes in ectomycorrhizas of spruce. New Phytol. 110:535–540.
3. Alexander, I. J. 1981. The Picea sitchensis + Lactarius rufus mycorrhizal association and its effects on seedling growth and development. Trans. Br. mycol. Soc. 76:417–423.
4. Alexander, J., and R. Watling. 1987. Macrofungi of Sitka spruce in Scotland. Proc. Roy. Soc. Edinburgh 93B:107–115.
5. Arnolds, E. 1985. Veranderingen in de paddestoelenflora (Mykoflora). Wetensch. meded. Kon. ned. natuurhist. ver. 167.