1. Liquid chromatography on silica using mobile phases containing aliphatic carboxylic acids
2. High-performance liquid chromatographic studies of coal liquids by laser-based detectors
3. Fossil Fuels Analysis by LC,1975
4. Distinguishing Coal Tar (Petroleum Pitches), Application Notes No. 47, Micromeritics, Norcross, GA.
5. H. Elgass, Dissertation, Saarbrücken, 1978