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3. Some 1-dehydro and 9-a-fluoro steroids;Gibaldi, M.; Boyes, R.N.; Feldman, S.;Biochemical Journal; Influence of first pass effect on availability of drugs on oral administration,1971
4. Route of administration and drug metabolism;Gibaldi, M.; Feldman, S.;European Journal of Pharmacology,1972
5. First-pass metabolism of nortriptyline in man;Gram, L.F.; Overo, K.F.;Clinical Pharmacology and Therapeutics,1976