Reference
Michael Tausz, S. Posch, Stephan Monschein, Dieter Grill, S. Löffler, Ralf Kätzel (2005): Do Photoprotective Pigments and Antioxidants in Needles of Pinus sylvestris Relate to High N or Water Availability at Field Plots in a Dry Year?. – Phyton, Annales Rei Botanicae, Horn – 45_3: 107 - 116.