1. Allen SE (1989) Chemical analysis of ecological material, 2nd edn. Blackwell Scientific Publications, Oxford
2. ASTM D6722-11 (2011) Standard test method for total mercury in coal and coal combustion residues by direct combustion analysis. ASTM International, West Conshohocken, PA
3. Babovic N, Drazic G, Djordjevic A, Mihailovic N (2010) Heavy and toxic metal accumulation in six macrophyte species from fish pond Ecka, Republic of Serbita. BALWOIS - Ohrid, Republic of Macedonia
4. Baek Y-W, An Y-J (2010) Assessment of toxic heavy metals in urban lake sediments as related to urban stressor and bioavailability. Environ Monit Assess 171:529–537
5. Barker AV, Pilbeam DJ (2007) Handbook of plant nutrition. CRC Taylor and Francis, Boca Raton, London, New York