1. Introduction to Coordination Chemistry
2. https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_General_Chemistry_(Petrucci_et_al.)/24%3A_Complex_Ions_and_Coordination_Compounds/24.01%3A_Werner%E2%80%99s_Theory_of_Coordination_Compounds(accessed 2 July 2019).
3. Synthetic chelating agents and compounds exhibiting complexing properties in the aquatic environment
4. Gram-Negative, Aerobic, Nitrilotriacetate-Utilizing Bacteria from Wastewater and Soil