Howe PD.
A review of boron effects in the environment. Biological Trace Element Research. 1998 ;(66):153-166.
Cresser MS, Smith C, Sanger L.
Critical loads for peat soils. In:
Hornung M, Skeffington RA Critical Loads - Concepts and Applications. Critical Loads - Concepts and Applications. London: HMSO; 1993.