1. Separation of enzymes on the filter paper chromatopile;Mitchell;J. Biol. Chem.,1949
2. Elution and displacement analysis procedures with special reference to chromatography on carbon;Hagdahl;Arkiv Kemi,1952
3. Automatically increasing solvent polarity in chromatography;Donaldson;Anal. Chem.,1952
4. Principles of gradient elution;Snyder;Chromatogr. Rev.,1965