Weygandt's On the Mixed States of Manic-Depressive Insanity: a translation and commentary on its significance in the evolution of the concept of bipolar disorder.
Salvatore P, Baldessarini RJ, Centorrino F, Egli S, Albert M, Gerhard A, Maggini C. Weygandt's On the Mixed States of Manic-Depressive Insanity: a translation and commentary on its significance in the evolution of the concept of bipolar disorder. Harv Rev Psychiatry. 2002 Sep-Oct; 10(5):255-75.