Hi! I'm looking for a phd in phd in quantitative/computational finance/economics in Europe. Even if I have not a degree in mathematics, I have a BSc and MSc in Computer science(mathematical/statistical-oriented with several mathematical courses) both with the maximum grade and two international publications (besides two other technical reports). I studied in Italy. I really have no idea about how to staret my research of the right phd. Is there anyone who can help me? Thank you a lot! Symba

I would start looking at universities where you would like to start research and request information from them. For example, if you know you want to study in London - City University, Kings College or University College London are all good places for your subjects. I would then contact them for prospectuses and email them for advice.
Do you know exactly what you want to research yet?