S. Soemohardjo, I. G. Palgunadi, S. Gunawan, Z. Muttaqin, H. Widita, and W. A. A, “The Detection of H pylori In Gastric Mucosal Biopsy Specimens by PCR Using Primers Derived From Ure C Gene in Patients with Dyspepsia”, InaJGHE, vol. 8, no. 2, pp. 40–43, Jan. 2007.