1. P.F. Moulton, Opt. News, No. 6, 9, 1982
2. P.F. Moulton, Solid State Research Rep. DTIC ADA 124305/4, 15–21, 1982
3. P.F. Moulton, The twelfth international quantum electronics conference. Munich, Germany, June 1982.
4. A.J. Alfrey, IEEE J. Quant. Electron. 25(4), 760 (1989)
5. G.T. Maker et al., Opt. Lett. 15(7), 375 (1990)