Abdullayev S.S, Mamajonov O.A, Alimov U.K, and Ortiqova S.S, “Cyclic Technology for Obtaining Double, Triple Superphosphate and Concentrated Nitrogen-Phosphorus Fertilizer from Low-Grade Phosphorites of Central Kyzylkum”, Euro.J.Ph.Ch.Ma., vol. 6, pp. 49–54, May 2022.