1. W.J. McGraw, US Patent 2,624,723 (1953), to Allied Chemical and Die Corporation.
2. P.C. Watts, J. Martin, J. Chem. Soc., Chem. Commun. (1970) 27.
3. A.W. Murray, R.G. Reid, Synthesis-Stuttgart 1 (1985) 35.
4. R.D. Puts, C. Brandenburg, K.R. Tarburton, US Patent Application Publication 2002143195 A1 (2002), to DuPont.
5. Polymerization of (RS)- and (R)-α-methylene-γ-methyl-γ-butyrolactone