REM-Suppressing Effects of Amitriptyline and Amitriptyline-N-Oxide After Acute Medication in Healthy Volunteers: Results of Two Uncontrolled Pilot Trials - Riemann, D; Velthaus, Sabine; Laubenthal, Steffi; Müller, W E; Berger, M (Pharmacopsychiatry, 1990)