Spectroscopic, quantum chemical DFT/HF study and synthesis of [2.2.1] hept-2'-en-2'-amino-N-azatricyclo [3.2.1.0^2,4] octane, Abbas Teimouri, Mohammad Emami, Alireza Najafi Chermahini and Hossein A. Dabbagh  Spectrochemica Acta, A 2009, 71, 1749.