1. D. Freitag, U. Grico, P.R. Muller, W. Nouvertne, Polycarbonate, in: H.F. Mark (Ed.), Encyclopedia of Polymer Science and Engineering, Vol. 11, Wiley, New York, 1987, p. 649.
2. Dimethyl carbonate for environmentally benign reactions
3. Y. Okago, H. Hayashi, H. Miyagi, K. Kujira, M. Takagi, N. Suzuki, Jpn. Kokai Tokkyo Koho, JP 96 193,056 (1996).
4. J.A. King, Jr., T.E. Kraft, G.R. Faller, US. Pat., US 5,142,086 (1992).
5. H. Kezuka, F. Okuda, Eur. Pat., EP 503,581 (1992).