Pearce ISK, Woodin SJ, Van der Wal R. Physiological and growth responses of the montane bryophyte Racomitrium lanuginosum to atmospheric nitrogen deposition. New Phytologist. 2003  ;160 :145?155.

Press MC, Woodin SJ, Lee JA. The potential importance of an increased atmospheric nitrogen supply to the growth of ombrotrophic Sphagnum species. New Phytologist. 1986  ;103:45-55.