Hello. I previously used IEEE in my document but the only problem is that when using multiple sources, it separates them into different brackets. Is there any style that is similar to IEEE with the year at the end but merges multiple sources into a single bracket like this: [1,8,9] and [1-4] instead of [1], [8], [9]?. Also, if I wanted to change a reference style on zotero after writing a 50,000 word project can I automatically do that, or do I need to add all the references again using the new style?. Thanks