TY - JOUR TI - An investigation on the nonlinear behavior of unreinforced masonry walls AU - JAFAROV, O. AU - KÖKSAL, H.O. AU - DORAN, B. AU - KARAKOÇ, C. JO - Sigma Journal of Engineering and Natural Sciences PY - 2012 VL - 30 SP - 133 EP - 143 DO - ER -