1. Delwiche, C. C.Denitrification,Nitrification,and Atmosphere Nitrous Oxide; John Wiley & Sons: New York, 1981; pp 107−108.
2. Stumm, W.; Morgan, J. J.Aquatic Chemistry: Chemical Equilibria and Rates in Natural Waters, 3rd ed.; John Wiley & Sons: New York, 1996; pp 120−129.