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3. The standard enthalpies of formation of complex sulfate ions in water;Austin;J. Phys. Chem.,1962
4. System ferroussulphate-sulphuric acid-water at temperatures from 50 to 90°C;Belopolskii;J. Appl. Chem. USSR,1941
5. System ferroussulfate-sulphuric acid-water. II. Solubilities and densities of solutions at temperatures from −20 to +25°C;Belopolskii;Zhur. Priklad. Khim.,1948