1. C. M. Starks and C. Liotta, Phase Transfer Catalysis Principles and Techniques, Academic Press, New York-London (1978).
2. W. Weber and G. Gokel, Phase Transfer Catalysis in Organic Synthesis, Springer-Verlag, (1977).
3. E. V. Dehmlow and S. S. Dehmlow, Phase Transfer Catalysis, Springer-Verlag, Chemie, Weinheim (1980).
4. G. O. Torosyan and S. L. Paravyan, Arm. Khim. Zh., 34, 351 (1981).
5. M. Makosza and M. Fedorynski, Zh. Vses. Khim. Ova. im. D. I. Mendeleeva, 24, 466 (1979).