(EN) David J. Anneken, Sabine Both, Ralf Christoph, Georg Fieg, Udo Steinberner e Alfred Westfechtel, Fatty Acids, in Ullmann's Encyclopedia of Industrial Chemistry, Weinheim, Wiley-VCH, 2006, DOI:10.1002/14356007.a10_245.pub2.
(EN) David J. Anneken, Sabine Both, Ralf Christoph, Georg Fieg, Udo Steinberner e Alfred Westfechtel, Fatty Acids, in Ullmann's Encyclopedia of Industrial Chemistry, Weinheim, Wiley-VCH, 2006, DOI:10.1002/14356007.a10_245.pub2.