1. Aksoy A, Sahin U, Duman F (2000a) Robinia pseudo-acacia L. as a possible biomonitor of heavy metal pollution in Kayseri. Tr J Bot 24(5):279–284
2. Aksoy A, Celik A, Öztürk M (2000b) Plants as possible indicators of heavy metal pollution in Turkey. Chemia Inzneria Ekologiczna 11:1152–1161
3. Alloway PJ (1990) Heavy metals in soil. Wiley, NewYork, p 339
4. Aten CF, Bourke JB, Martini JH, Walton JC (1980) Arsenic and lead in an orchard environment. Bull Environ Contam Toxicol 24:108–115
5. Barber SA (1995) Soil nutrient bioavailability: a mechanistic approach. Wiley, New York, p 202–337