1. Aleksandrova, V. D., - 1969 Classification of Vegetation: Principles of Classification and Classification Systems of Various Phytocoenological Schools. (In Russian). Naukov, Leningrad. 275 pp.
2. Allorge, P., - 1922 Les associations végétales du Vexin francais. Revue gén. Bot. 33: 481–544 etc.; 34: 71–79 etc.
3. Almborn, O. 1948 Distribution and ecology of some South Scandinavian lichens. Bot. Notiser, Suppl. 1 (2): 1–354.
4. Almquist, E., - 1929 Upplands vegetation och flora. Acta phytogeogr. suec. 1: 1–622.
5. Andersson, O. 1950 Larger fungi on sandy grass heath and sand dunes in Scandinavia. Bot. Notiser, Suppl. 2 (2): 1–89.