3Frejacgues M.The Industrial Synthesis of Urea[].Chemistry and Industry.1948
4Urea Relrofits.Maximixing gains[].Nitrogen :~ Zardif Casale Advanced Technologies for urea plants upgrading part Casale high efficiency trays and H O passivation system Casale-SIECC Symposium Shanghai ChinaDec.1998
5G Pagani.IDR Technology cuts to a minimum the energy consumption in urea plants[].Nitrogen.1983