1. Möller, E. et al., Experientia 33, 3, 382, 1977
2. Loew, D., Meng, K., Pharmatherapeutica 1, 333, 1977
3. Meng, K. et al., Curr. Med. Res. Opin. 4, 555, 1977
4. Ponti, G.B. et al., Curr. Ther. Res. 28, 520, 1980
5. Ponti, G.B. et al., Rev. Med. Pharm. Sci., 5, 569, 1983