Heinz-Dieter Brandt, Wolfgang Nentwig, Nicola Rooney, Ronald T. LaFlair, Ute U. Wolf, John Duffy, Judit E. Puskas, Gabor Kaszas, Mark Drewitt and Stephan Glander in "Rubber, 5. Solution Rubbers" Ullmann's Encyclopedia of Industrial Chemistry, 2011, Wiley-VCH, Weinheim. doi:10.1002/14356007.o23_o02