1. Neu, H.C., Rev. Infect. Dis., 1981, 3, 110 (rev)
2. Sjoevall, J., J. Antimicrob. Chemother., 1981, 8, (Suppl. C), 41 (rev)
3. Mashimo, K., Jpn. J. Antibiot., 1982, 35, 2723 (rev)
4. Akita, H. et al, Chem. Pharm. Bull., 1984, 32, 4317 (synth)
5. Nyquist, H. et al, Acta Pharm. Suec., 1985, 22, 215, 229 (props)