Merdzhanova, T. [P:(DE-Juel1)VDB14656] ; Carius, R. [P:(DE-Juel1)VDB4964] ; Klein, S. [P:(DE-Juel1)VDB5924] ; Finger, F. [P:(DE-Juel1)130238] ; Dimova-Malinovska, D. [P:(DE-HGF)0]