Keck, Gary E.; Wager, Carrie A.; Wager, Travis T.; Savin, Kenneth A.; Covel, Jonathan A.; McLaws, Mark D.; Krishnamurthy, Dhileep; Cee, Victor J. Angewandte Chemie, International EditionAngewandte Chemie, 20012001, vol. 40113, # 1 p. 231 - 234237 - 240 doi: 10.1002/1521-3773(20010105)40:1<231::AID-ANIE231>3.0.CO;2-W