1. Root Excision Decreases Nutrient Absorption and Gas Fluxes
2. ČSN ISO 7150-1 (1994) Water Quality. Assessment of ammonium ions. Part 1: Manual spectrometric method (in Czech). Český normalizační institut, Praha, pp 3–11
3. ČSN ISO 7890-3 (1994) Water Quality. Assessment of nitrates. Part 3: Spectrometric method with sulphosalicylic acid (in Czech). Český normalizační institut, Praha, pp 2–7
4. Fiala K (1997) Underground plant biomass of grassland communities in relation to mowing intensity. Acta Scientiarum Naturalium Academiae Scientiarum Bohemicae. Institute of Landscape Ecology, Brno