Reporting Duplicate Pages

Is there a preferred way to report duplicates? I've reported several clear cases of duplicate pages for people and titles since I've been a registered user. Sometimes it is corrected and sometimes it is not. For instance, one of the ones not corrected was 11 Days, 11 Nights (1987). There are currently three different pages for that movie, one with the Italian title (Undici giorni, undici notti).