1. Analyse et synthèse de l'approche géométrique pour les systèmes lináires su un anneau;Assan,1999
2. Effective computation of maximal controlled invariant submodules over a principal ring;Assan,1999
3. An algorithm to compute the maximum controllability submodule over a principal ideal domain;Assan,1998
4. Computing the maximum pre-controllability submodule over a noetherian ring;Assan,1998
5. On feedback invariance properties for systems over a principal ideal domain;Assan;IEEE Transactions on Automatic Control, AC-44,1999