1. Kononov AV, Sterlin VN and Yevdokimova LI (1988) Osnovy tekhnologii kompleksnykh udobreny (Principles of technology of complex fertilizers). Khimiya, Moscow, USSR (In Russian)
2. Almàssy G and Zador G (1970) Szuperfosfàt, karbamid ès kaliumklorid tartalmu kevertmütràgyàk. Magy Kèm Lapja 11: 562?568 (In Hungarian)
3. Frazier AW, Lehr JL and Smith JP (1967) Urea-monocalcium phosphate, a component of mixed fertilizers. J Agr Food Chem 15: 345?347
4. Misra NP, Mohan S, Singh JP and Varma S (1985) A new granulation process for TSP-urea based NP/NPK fertilizers. Fert News 30: 36?40, 57
5. Urea in compound fertilizers (1970) Nitrogen 66: 29?34