THE EFFECTS OF NITRENDIPINE AND RANITIDINE ON GASTRIC ULCERS AND GASTRIC MUCOSAL BARRIER IN STRESSINDUCED RATS - ULAK, Güner; ŞERMET, Abdurrahman; GÜZEL, Cihat; AKTAY, Göknur; DENLİ, Orhan and YENİCE, Necati (Turkish Journal of Gastroenterology, 1993)