1. J.-C. Vire, M. Fischer, G.J. Patriarche and G.D. Christian, Talanta, 28 (1981) 313–317.
2. J.-C. Vire, M. Fischer and G.J. Patriarche, Analusis, 10 (1982) 19–22.
3. X. Guo and S. Lin, Huaxue Xuebao, 50 (1992) 378–382.
4. E. Bishop and W. Hussein, Analyst, 109 (1984) 139–141.
5. S. Pap, J.-M. Kauffmann, J.-C. Vire, G.J. Patriarche and M.P. Prete, J. Pharm. Belg., 39 (1984) 335–340.