International co-supervision is intended for doctoral students enrolled in an Algerian higher education establishment. It requires another registration with the foreign partner institution,

      A thesis is also a form of bilateral scientific cooperation in which the expertise of two research supervisors enables the future doctor to carry out original work.

     This is a specific form of co-directorship, and falls within the scope of an agreement that covers all aspects of the doctorate, from registration to defense and the award of one or two degrees.