Activity of cefotiam in combination with beta-lactam antibiotics on enterobacterial hospital strains36636, Vanhoof, R., Hubrechts J.M., Nyssen H.J., Nulens E., Leger J., de Schepper N., Kupperberg E., and Couvreur M.L. , Pharm.Weekbl.Sci., 22/6/1990, Volume 12, Issue 3, Number 106, p.104 - 106, (1990)