1. Krohs W. (1965): Pyrazole Derivatives in ‘Analgetics’, edited by G. deStevens, Academic Press, New York, pp. 331–403.
2. Larsen V., Dredahl E. (1966): The embryotoxic effect on rabbits of monophenyl butazone (Monazan) compared with phenylbutazone and thalidomide. Acta Pharmacol. Toxicol.,24, 443–455.
3. Thune S. (1967): Comparison of phenyl- and monophenylbutazone (Mobutazon), especially in respect to the incidence of side effects. A double blind study. Acta Rheumatolog. Scand.,13, 63–80.
4. Woodbury J.F.L., Turner W.A., Tiongson R. (1969): Rheumatoid arthritis: comparison of treatment with monophenylbutazone and phenylbutazone. Can. Med. Assoc. J.101, 801–803.
5. Scarselli V. (1959): Tossicita e cinetica dell eliminazione del 2-fenil, 3,5-diossi, 4-n-butil, pirazolidina comparativamente a quelle del 1,2-difenil-derivato. II Farmaco, Ed. Sci.,14, 347–351.