http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1342026&dopt=Abstract
Int J Neurosci 1992 Mar;63(1-2):141-50
Sandyk R, Anninos PA, Tsagas N, Derpapas K.
Democrition University of Thrace, Department of Medical Physics and Polytechnic School, Alexandroupolis and Xanthi, Greece.