Ferromanganese and ferrosilicomanganese; determination of manganese content; potentiometric method (ISO 4159, 1st edition: 1978.12.15); german version EN 24159:1989— 5 стр.
Ferronickels - Determination of sulfur content - Infrared absorption method after induction furnace combustion (ISO 7526:2020); German version EN ISO 7526:2020— 21 стр.