Suppose I make two citations at the same place

\cite{ref1}, \cite{ref2}

It would appear as

[1], [2]

Sometimes I see a reference like

[1, 2]

How is that done in TeX? Also, when should I use one over the other?

  • 2
    \cite{key1,key2}? – Sigur Apr 21 '14 at 19:52

Multiple citations at the same place can be achieved with


Some bibliographic styles (ieee for example) turn multiple citations, i.e., [1,2] into [1], [2]. So, for the second part, it is a matter of the style used and customs.

| improve this answer | |
  • 5
    Thank you! It is useful to realize that there should not be any space between the reference key and comma. – zyy Jun 27 '17 at 17:26

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