The local structure of essentially conformally symmetric manifolds with constant fundamental function. III. The parabolic case A. Derdziński — 1981 Colloquium Mathematicae
The local structure of essentially conformally symmetric manifolds with constant fundamental function II. The hyperbolic case A. Derdziński — 1981 Colloquium Mathematicae
The local structure of essentially conformally symmetric manifolds with constant fundamental function I. The elliptic case A. Derdziński — 1979 Colloquium Mathematicae