1. Demoen, Paul, Janssen Pharmaceutica, Beerse, Belgium, unpublished data.
2. Specific Assay Methods for Droperidol and Fentanyl Citrate in a Pharmaceutical Combination
3. Mass spectra of haloperidol and related neuroleptics (major tranquilisers)
4. Van Rompay, J., Janssen Pharmaceutica, Beerse, Belgium, unpublished data.
5. Janssen, P.A.J., and Gardocki, J.F., U.S. Patent 3,141,823, (1964).