http://christopherthielen.github.io/ui-router-extras/
More info: http://webjars.org
Either use /META-INF/resources/webjars/ui-router-extras/0.0.13/ui-router-extras.[min.]js OR the files in the modular folder (see https://github.com/christopherthielen/ui-router-extras#modular-install).
In RequireJS/AMD, the files are available as ui-router-extras or ct-ui-router-extras.*.
Their dependencies are already declared.