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/* Bootstrap, AngularJS and Angular UI Bootstrap are added as External Resources */
var myApp = angular.module('MyApp', ['ui.bootstrap']);

myApp.controller('MainController', function($scope) {
   $scope.what = 'Angular'; 
});

<div class="container" ng-app="MyApp" ng-controller="MainController">
    <h1>Hello {{ what }}!</h1>
    <div class="btn-group">
        <label class="btn btn-primary" ng-model="what" btn-radio="'Angular'">Angular</label>
        <label class="btn btn-primary" ng-model="what" btn-radio="'Bootstrap'">Bootstrap</label>
        <label class="btn btn-primary" ng-model="what" btn-radio="'UI Bootstrap'">UI Bootstrap</label>
    </div>
</div>

/* Bootstrap CSS included as External Resource*/

body {
    margin: 10px;
}