Vardakou, I. Dona, A. Pistos, C. Alevisopoulos, G. Athanaselis, S. Maravelias, C. Spiliopoulou, C., Validated GC/MS method for the simultaneous determination of clozapine and norclozapine in human plasma. Application in psychiatric patients under clozapine treatment, Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences, (878), 2327-2332, 2010,