{{cite journal | last1=Boulaouad | first1=B. A. | author2=O. Ailam | author3=S. Daoudi-Hacini | author4=S. Doumandji. | year=2018 | title=TROPHIC ECOLOGY OF SHORT-TOED TREECREEPER’S CERTHIA BRACHYDACTYLA (BREHM, 1820) NESTLING IN THE SUBURBAN AREA OF ELHARRACH (ALGERIA) | journal=Journal of Animal and Plant Sciences | volume=28 | issue=1 | pages=321-326 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2018-JAPS-38}}