A Direct Approach to the Determination of Gaussian and Scalar Curvature Functions.
A Fundamental Property of Monge Characteristics in Involutive Systems of Non-Linear Partial Differential Equations and its Application.
A Geometric Construction of the Discrete Series for Semisimple Lie Groups.
A quantization for Kähler fields in static space-times
A remark on linear functions on the sphere
A remark on the differential equations on the sphere
A Twistor Correspondence for Homogeneous Polynomial Differential Operators.
A vanishing theorem for a class of Systems with simple characteristics.
An intrinsic definition of the Dirac operator.
Analyticity for certain solutions of non-hypoelliptic differential operators on the Heisenberg group
Antilocality of complex powers of elliptic differential operators with analytic coefficients