1. V. A. Krasnoborov, S. L. Yaroshevskii, A. A. Denisov, et al., Efficiency and Prospects of the Use of Siderite Ore in Blast-Furnace Smelting [in Russian], DonGTU, Donetsk (1996), p. 10.
2. Blast Furnaces. Directive on Standards for Coke Consumption, Min. Chern. Met. SSSR, Tekh. Upr., Moscow (1987), p. 10.