1. I. Buśko-Oszczapowicz, J. Oszczapowicz, in “The Chemistry of Amidines and Imidates”, vol. 2, (S. Patai and Z. Rappoport, Eds.), John Wiley, London, New York, 1991, p. 231.
2. F. Lund, L. Tybring, Nature, New Biology236, 135 (1972).
3. G. N. Lipunova, I. L. Sharova, E. C. Darienko, N. P. Bednyagina, G. N. Sigeikin, Yu. I. Aleksanrov, Zh. Obshch. Khim.53, 178 (1983), cf. Ref. [1]I. Buśko-Oszczapowicz, J. Oszczapowicz, in “The Chemistry of Amidines and Imidates” vol. 2, (S. Patai and Z. Rappoport, Eds.), John Wiley, London, New York, 1991, p. 231.
4. E. Pawlak, Z. Goluckt, Acta Polon. Pharm.34, 413 (1977).
5. I. Buśko-Oszczapowicz, J. Cieślak, Acta Pol. Pharm.30, 43 (1973), cf. Ref. [1].I. Buśko-Oszczapowicz, J. Oszczapowicz, in “The Chemistry of Amidines and Imidates” vol. 2, (S. Patai and Z. Rappoport, Eds.), John Wiley, London, New York, 1991, p. 231.