Drissi, Amor http://orcid.org/0000-0003-2704-4997
Belhaj Rhouma, Nedra
Funding for this research was provided by:
Laboratoire d’Analyse Mathématiques et Applications (LR11ES11, LR11ES11)
Article History
Received: 22 January 2018
Accepted: 2 December 2018
First Online: 11 December 2018