Where is bootstrap-responsive.css?

I know that by default the bootstrap doesn't come with the file, but after I customized (I've selected all the responsive features!) I still can't see the file. At the docs, it says that I should do this on head tag:

<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="assets/css/bootstrap-responsive.css" rel="stylesheet">

But the truth is that I don't even have the folder assets. What I do have is:

\bootstrap
    \img
    \css
    \js

Can anyone help me?

Since Bootstrap 3 you don't need responsive.css anymore. Because it is inside default bootstrap.css.

Related: https://stackoverflow.com/a/16379181/429938

Download http://twitter.github.com/bootstrap/assets/bootstrap.zip and uncompress.

\bootstrap\css\bootstrap-responsive.css

\bootstrap\css\bootstrap-responsive.min.css

look here http://twitter.github.io/bootstrap/scaffolding.html#responsive

Bootstrap doesn't include responsive features by default at this time as not everything needs to be responsive. Instead of encouraging developers to remove this feature, we figure it best to enable it as needed.

So if you need bootstrap-responsive.css, you should download it from bootstrap-source, from here for example: http://twitter.github.io/bootstrap/index.html