DISSOLUTION KINETICS OF MANGANESE(III, IV) OXIDES IN SULFURIC ACID IN THE PRESENCE OF ETHYLENEDIAMINETETRAACETIC ACID ArticlePankratova A.B., Nevskaya E.Yu., Kutepov A.M., Gorichev I.G., Izotov A.D., Zaitsev B.E.Theoretical Foundations of Chemical Engineering. Том 35. 2001. С. 168-174