D. Tillie

Effects of a novel method of acute tryptophan depletion on plasma tryptophan and cognitive performance in healthy volunteers

J. Jolles, E. Evers, F. V. D. Veen, 2004, Psychopharmacology.

Memory impairments in humans after acute tryptophan depletion using a novel gelatin-based protein drink

A. Postma, A. Blokland, A. Sambeth, 2009, Journal of psychopharmacology.

Effects of a novel method of acute tryptophan depletion on plasma tryptophan and cognitive performance in healthy volunteers

J. Jolles, E. Evers, F. V. D. Veen, 2004, Psychopharmacology.