List of Articles زيست¬ Open Access Article Abstract Page Full-Text 1 - Analyzing the effectiveness and ranking engineering changes for complex engineered systems viability improvement مالک طهوری جعفر قیدرخلجانی Mohammad Hussein Karimi gavareshki Open Access Article Abstract Page Full-Text 2 - Biostratigraphy, conodont biofacies and CAI of Late Devonian-Carboniferous deposits in Anarak section, Central Iran ٍٍElahe Sattari Ali Bahrami Hosyen Vaziri moghadam Ali Taheri Sandra Isabella Kaiser Peter Königshof