1. ASTM D3176 (1989) Standard Practice for Ultimate Analysis of Coal and Coke, Annual Book of ASTM Standards. v. 05.05.
2. ASTM D5373 (1993) Standard Test Methods for Instrumental Determination of Carbon, Hydrogen, and Nitrogen in Laboratory Samples of Coal, pp.1–11.
3. ASTM D5373-04 (2004) Standard test methods for instrumental determination of carbon, hydrogen, and nitrogen in laboratory samples of coal and coke. In: Annual Book of ASTM Standards, Part 26. Gaseous Fuels: Coal and Coke ASTM, Philadelphia, PA, pp. 504–507.
4. ASTM-D5373-08 (2008) Standard test methods for instrumental determination of carbon, hydrogen, and nitrogen in laboratory samples of coal.
5. ASTM D5373-15 (2013) Determination of Carbon, Hydrogen and Nitrogen in Analysis Samples of Coal and Carbon in Analysis Samples of Coal and Coke. ASTM International, West Conshohocken, PA.