Takashi Ohara, Takahisa Sato, Noboru Shimizu, Günter Prescher, Helmut Schwind, Otto Weiberg, Klaus Marten, Helmut Greim "Acrylic Acid and Derivatives" in Ullmann's Encyclopedia of Industrial Chemistry, 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a01_161.pub2