Reference
T. Nakaji, Y. Yonekura, M. Kuroha, S. Takenaga, T. Izuta (2005): Growth, Annnual Ring Structure and Nutrient Status of Japanese Red Pine and Japanese Cedar Seedlings After Three Years of Excessive N Load. – Phyton, Annales Rei Botanicae, Horn – 45_4: 457 - 464.