Am akken daɣen id d-yesbadu BERKAI.A.(2002 :p12): Areṭtal d yiwen n usekkiri i d- yemmalen aggay n yiwen n uzamul utlayan ummid, neɣ aḥric deg-s yiwet n tutlayt deg tayeḍ.3 2.7.1. Tabadut n ureṭṭal