Multiple citations at once

[jdossgollin]

It would be interesting to be able to cite multiple papers at once -- something like [@@citation1;citation2;citation3] or similar. However, it seems that the way the citations are located

CITE_RE = re.compile("\[@(@)?\s*(\w.*?)\s*\]")

doesn't allow it. Am I missing something? If not, would be an interesting feature if someone wants to develop further (I'm hopeless at regex 😞, so probably not going to try -- sorry!)