3) P. -A. Loschmann, K. J. Rettig, R . Horowski, H. Wachtel, K. W. Lange, P. Jenner and C. D. Marsden : Terguride, a dopamine partial agonist for the treatment of parkinson's disease. Basic, Clinical and Therapeutic Aspect of Alzheimer's and Parkinson's disease Volume 2, Edited by T. Nagatsu et al., Plenum Press, New York 569-572 (1990)