“Study the Spread of Resistant Strains Klebsiella Cephalosporins Pattern of ESBL in Alassad University Hospital and in Tishreen University Hospital”. Tishreen University Journal -Medical Sciences Series, vol. 39, no. 4, Sept. 2018, https://journal.tishreen.edu.sy/index.php/hlthscnc/article/view/3982.