1. B.J. Klemens, Process for the separation of monocarboxylic acids from a mixture of monocarboxylic, hydroxycarboxylic and dicarboxylic acids, US Patent 3,993,691, 1976.
2. S. Hellmuth, E. Walter, B.J. Klemens, Process for obtaining esters from cyclohexanone waste, US Patent 3,859,335, 1975.
3. B.J. Klemens, Separation of acids and esters in the processing of waste salt solution of cyclohexanone manufacture, US Patent 4,052,441, 1977.
4. An in situ coupling separation process of electro-electrodialysis with back-extraction;Yi;J. Memb. Sci.,2005
5. Detailed investigation of an electrodialysis process during the separation of lactic acid from a complex mixture;Thang;J. Memb. Sci.,2005