Reference
N. Wada, K. Watanuki, A. Kume, K. Narita, S. Suzuki, G. Kudo (2005): Climata Change and Shoot Elongation of Alpine Dwarf Pine (Pinus pumila Regel): Comparisons between Six Japanese Mountains. – Phyton, Annales Rei Botanicae, Horn – 45_4: 253 - 260.