Much research work has been done by Iris Colditz (see her list of publications) in close cooperation with the Akademienvorhaben Turfanforschung der Berlin-Brandenburgischen Akademie der Wissenschaften and others. The results have been presented at the congresses of the International Association of Manichaean Studies (IAMS) and are published mainly as articles. See also the monograph by I. Colditz: Zur Sozialterminologie der iranischen Manichäer.