Cannot find name 'angular' - error on Cordova plugin

Ionic Framework ionic-v3
1

I get “Cannot find name ‘angular’” when I add this code:

let app = angular.module(‘MyApp’, [‘ngCordova.plugins.zeep’]);
app.controller(‘MyController’, function($scope, $cordovaZeep) { …

It is from “cordova-plugin-zeep-ionic3” at

How do I declare an object named “angular”?