1. NMP (Arosolvan) process for BTX separation, Chap. 18.2.1;Muller,1991
2. Extraction of aromatics from middle distillate using N-methyl-2-pyrrolidone: experiment, modeling and optimization;Al-Jimaz;I&EC Res.,2007
3. BASF, 2016. 〈http://www.cbi.com/getattachment/f8d91886-4916-43d4-a554-ba8201036c9b/Butadiene-Extraction-Technology.aspx〉.
4. H.L. Fleming, C.S. Slater, Pervaporation, in: W.S.W. Ho, K.K. Sirkar (Eds.), Membrane Handbook, Van Nostrand Reinhold, New York, 1992
5. Springer, reprinted, 2001, Chaps. 7-10.