Worst app, after doing my theses, the app crashed completely and messed up with all refernces, I have done everything possible to restore my references sequence, nothing wiuld help really, had only few days to supmit my these and was completely paniced and stressed out, untill somehow, found mendelly by searching youtube, it was a live saver for me, started arranging all my references again, it was relly supper inteutive and interactive experience, I really apprecitae it, so pls guys stay away from Zitero if u wanna avoid messing up and confusing experience,