Abay, Eşref Abay, Esref Abay, E. Eşref Abay Grissh Authority ID 57485544557441fe5d00009c Scopus ID 53983654200 ResearchGate ID Esref-Abay Abay, Esref Abay, Eşref https://independent.academia.edu/E%C5%9FrefAbay https://unisis.ege.edu.tr/researcher=esref.abay