RT Article T1 Methodological problems with the classification of personality disorders - the significance of existential types JF Journal of personality disorders VO 5 IS 1 A1 Kraus, A. LA English YR 1991 UL https://krimdok.uni-tuebingen.de/Record/1640153462 K1 Persönlichkeitsstörung K1 Geisteskrankheit