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2. GOST (State Standard) 12365-84: Alloy and High-Alloy Steels. Methods for Determination of Zirconium, 1984.
3. GOST (State Standard) 12364-84: Alloy and High-Alloy Steels. Methods for Determination of Cerium, 1984.
4. OST (Industry Standard) 1-90142-96: Heat-Resistant Nickel Alloys. Methods for Determination of Lanthanum and Cerium, 1996.
5. OST (Industry Standard) 1-90433-96: Heat-Resistant Nickel Alloys. Methods for Determination of Zirconium and Hafnium, 1996.