Z. A. AKTAN, P. J. STOWARD, F. GÖVSA, M. BAKA, and T. ÖZGÜR, “THE INVESTIGATION OF IMMUNOGLOB ULINS AT OESOPHAGUS BIOPSIES OF TWENTY PATIENTS WITH DYSPEPSIA”, Turkish Journal of Gastroenterology, vol. 5, no. 4, pp. 686–688, Jan. 1994.