1. Gilman AG, Rall TW, Nies AS, Taylor O, editors. Therapeutic uses of drug for Parkinson's disease. In: The pharmacological basis of therapeutics, 8th ed. New York: McGraw-Hill Inc., 1992. p. 160, 477.
2. Pharmacokinetics of trihexyphenidyl after short term and long term administration to dystonic patients;Burke;Ann Neorol,1985
3. Withdrawal of trihexyphenidyl;McInnis;Acta Psychiatr Scand,1985
4. Touitou E. Compositions for applying active substances to or through the skin. US Patent 5540934, 1996.
5. Touitou E, Composition for applying active substances to or through the skin. US Patent 5716638, 1998.