How to break lines in LaTeX Bibliography

I have a very long url in my bibliography that it's not b开发者_如何学Goroken so appears outside margins. How could I fixed id? some breakline stuff?

Thanks!

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You should use the url package here, which will automatically allow linebreaks.

You mention in your comment that you are already using the package. Have a look at section 5.2, then, and allow extra linebreaks.