1. Ahmad JU, Goni MA (2010). Heavy metal contamination in water, soil, and vegetables of the industrial areas in Dhaka, Bangladesh. Environmental Monitoring and Assessment., 166:347–357
2. Antoniadis V, Alloway BJ (2002). The role of dissolved organic carbon in the mobility of Cd, Ni and Zn in sewage sludge-amended soils. Environmental Pollution, 117: 515–521. doi:10.1016/S0269- 7491(01)00172–5.
3. AOAC (1990). Official methods of analyses. Method no. 975.03 metal in plants, AAS method (15th ed., p. 42). Arlington: Association of Official Analytical Chemists, Inc.
4. Arora M, Kiran B, Rani S, Rani A, Kaur B, Mittal N (2008). Heavy metal accumulation in vegetables irrigated with water from different sources. Food Chemistry, 111:811–815
5. Awashthi, S. K. (2000). Prevention of Food Adulteration Act No. 37 of 1954. Central and state rules as amended for 1999 (3rd ed., ). New Delhi: Ashoka Law House.