21 year old Greek Erasmus student looking for accommodation in Bologna

I am a 21 years old Erasmus student from Thessaloniki Greece. I study agricalture at Aristotle University of Thessaloniki. From February 2016 until end of July 2016 I will study Agricalture in Bologna' s university. I am looking for a single flat or a bedroom in a shared flat with other university students. I prefer it to be near the center of the city, with Wi-Fi.