Aya-agi dayen i nufa di tezrewt n doctorat n Mass R ƐACUR .md: asemmad usrid d isem yettili deg waddad ilelli yettas-d srid ɣef umyag,md:yura-as tabrat md :asemmad imsegzi d isem yettili kan deg waddad: yura uqcic izen .