On the Noncommutative Geometry of the Endomorphism Algebra of a Vector   Bundle
  In this letter we investigate some aspects of the noncommutative differential geometry based on derivations of the algebra of endomorphisms of an oriented complex hermitian vector bundle. We relate it, in a natural way, to the geometry of the underlying principal bundle and compute the cohomology of its complex of noncommutative differential forms. 
T. Masson (LPTHE, Univ. Paris XI)