1. Baldea, I., Ghirisan, A., and Panea, I, J. Chem. Soc., Perkin Trans. 2, 1992, no. 10, p. 1715.
2. Panea, I., Ghirisan, A., Cristea, I., Gropeanu, R., and Silberg, I.A., Heterocyclic Communications, 2001, vol. 7, no. 6, p. 563; C.A., 2002, vol. 137, 109250e.
3. Cristea, I., Stud. Univ. Babes-Bolyai, Chem., 1988, vol. 33, no. 2, p. 61.
4. Cristea, I. and Panea, I., Stud. Univ. Babes-Bolyai, Chem., 1995, vol. 40, nos. 1–2, p. 171.
5. Panea, I. and Cristea, I., Stud. Univ. Babes-Bolyai, Chem., 1996, vol. 41, no. 1, p. 9.