H. H. Darbinyan, A. R. Mkrtchyan, G. N. Shaposhnikova, and H. G. Khachatryan, “INVESTIGATION OF INTERACTION OF PHENYLTHIOUREA WITH MANGANESE (VII) AND CROMIUM (VI) AND DETERMINATION OF CROMIUM IN CROMIUM-CONTAINING ORE BY MEANS OF POTENTIOMETRIC TITRATION METHOD”, Proc. YSU B: Chem. Biol. Sci., vol. 44, no. 1 (221), pp. 23–28, Feb. 2010.