Gerrit A. Luinstra, Gerhard R. Haas, Ferenc Molnar, Volker Bernhart, Robert Eberhardt, Bernhard Rieger,
On the formation of aliphatic polycarbonates from epoxides with chromium(III) and aluminum(III) metal-salen complexes. Chemistry: A European Journal. ,vol. 11, pp. 6298- 6314 ,(2005) ,
10.1002/CHEM.200500356