Test of the exponential decay law at short decay times using tau leptons

This is the post-print version of the final paper publishedin Physics Letters B. The publishedarticle is available from the link below. Changes resulting from the publishingprocess, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. Copyright @ 1996 Elsevier B.V