1. Interspecific competition in natural plant communities: mechanisms, trade-offs and plant–soil feedbacks;Aerts;Journal of Experimental Biology,1999
2. Chemical Analysis of Ecological Materials;Allen,1989
3. Regional and historical variation in the nitrogen content of Racomitrium lanuginosum in Britain in relation to atmospheric nitrogen deposition;Baddely;Environmental Pollution,1994
4. Mineral nutrition, substratum ecology, and pollution;Bates,2000
5. Measuring Change in British Vegetation. Ecofact Volume 3;Bunce,1999