For citations:

Mazo A.M., Akopyan A.I., Zorkin S.N., Vasiljeva E.M., Mayanskiy N.A., Zacalucin R.M., Tsygin A.N. Fractional excretion of sodium and urine lithogenic factors in children with urolithiasis. Nephrology and Dialysis. 2010;12(4):299-303. (In Russ.)