1. S. Patai, Z. Rappoport, in: S. Patai (Ed.), The Chemistry of Alkens, chap. 8, Interscience, London, 1964.
2. REACTIONS OF ALPHA, BETA-UNSATURATED DINITRILES
3. A. Levitzki, C. Gilon, M. Chorev, A. Gazit, Eur. Pat. Appl. EP 322738, 05 Jul 1989; CA 112: P172316e.