Question: Hello
Suppose I have 3 references that goes one after another i.e [1][2][3].

But I want to see [1]-[3].

What should I do.

Thank you.

Answer: 
There are ways to change how bibtex formats your citations. One way is to use the [cite](https://ctan.org/pkg/cite) package. Another is the [natbib](http://ctan.org/pkg/natbib) package perhaps with the sort&compress option (i.e., \usepackage[sort&compress]{natbib}). Many publications also have their own styles that will accomplish this, I often use the [revtex](https://journals.aps.org/revtex) styles even when not writing for APS journals since they work quite well. Try some of these to see if they help.
Using `\cite` package would probably resolve your problem. 
You could add either of the following lines to your code:

```
\usepackage{cite}
\usepackage[noadjust]{cite}

```