• Allen S ( ed. ). 1989. Chemical analysis of ecological materials, 2nd edn. Blackwell Scientific Publications. Oxford, UK.
  • Ball DF. 1960. The soils and land use of the district around Rhyl and Denbigh. Memoirs of the soil survey of Great Britain, England and Wales. Harpenden, UK: Agricultural Research Council.
  • Bradshaw AD, Lodge RW, Jowett D, Chadwick MJ. 1958. Experimental investigations into the mineral nutrition of several grass species Part I. Calcium level. Journal of Ecology 46: 749757.
  • Cooper A & Etherington JR. 1974. The vegetation of Carboniferous limestone soils in South Wales. I Dolomitization, soil magnesium status and plant growth. Journal of Ecology 62: 179190.
  • Dixon JM. 2001. On the status of the genus Koeleria Pers in Britain. Watsonia 23: 377390.
  • Findlay DC 1965. The soils of the Mendip District of Somerset. Memoirs of the soil survey of Great Britain, England and Wales. Harpenden, UK: Agricultural Research Council.
  • Frisby ME. 1961. The Rendzina soils of the Magnesian Series in Durham. MSc thesis, University of Durham.
  • Grime JP & Lloyd PS. 1973. An ecological atlas of grassland plants. London, UK: Edward Arnold.
  • Hunter AS. 1949. Yield and composition of alfalfa as affected by variations in the calcium- magnesium ratio in the soil. Soil Science 67: 5362.
  • Jeffries RL & Willis AJ. 1964. Studies on the calcicole-calcifuge habit II. The influence of calcium on the growth and establishment of four species in soil and sand culture. Journal of Ecology 52: 691707.
  • Karataglis S, Babalonas D, Kabasakalis B. 1982. The ecology of plant populations growing on serpentine soils. II Ca/Mg ratio and the Cr,Fe,Ni, Co concentrations as development factors of Buxus sempervirens L. Phyton (Austria) 22: 317327.
  • Kelley WP & Brown SM. 1927. Replaceable bases in soils. Department of Agriculture Experimental Station Technical Paper 15. Berkeley, CA, USA: University of California.
  • Key JL, Kurtz LT, Tucker BB. 1962. Influence of ratio on exchangeable calcium-magnesium on yield and composition of soybeans and corn. Soil Science 93: 265270.
  • Malloch AJC. 1971. Vegetation on the maritime cliff-tops of the Lizard and Land's End Peninsulas West Cornwall. New Phytologist 70: 11551197.
  • Martin JC. 1929. Effect of crop growth on replaceable bases of some California soils. Soil Science 27: 123136.
  • Nagy L & Proctor J. 1997. Soil Mg and Ni as causal factors of plant occurrence and distribution at the Meikle Kilrannoch site in Scotland. New Phytologist 135: 561566.DOI: 10.1046/j.1469-8137.1997.00681.x
  • Proctor J. 1971. The plant ecology of serpentine. II. Plant response to serpentine soils. Journal of Ecology 59: 397410.
  • Proctor J & Woodell SRJ. 1971. The plant ecology of serpentine. I. Serpentine vegetation of England and Scotland. Journal of Ecology 59: 375395.
  • Rodwell JS ( ed. ). 1992. British plant communities, Vol. 3. Cambridge, UK: Cambridge University Press.
  • Sanik J Jr, Perkins AT, Schrenk WG. 1952. The effect of the calcium-magnesium ratio on the solubility and availability of plant nutrients. Soil Science Society of America Proceedings 16: 263267.
  • Trefor Jones H. 1951. Magnesium as a plant nutrient. Chemistry and Industry 7: 11081110.
  • Walker RB. 1954. The ecology of serpentine rocks. II. Factors affecting plant growth on serpentine soils. Ecology 35: 259266.