How to use the AngularJS ngShow directive to show only if an element is in an array?

How to use the AngularJS ngShow directive to show only if an element is in
an array?

My goal is to, rapidly, have a tag displaying all the authors associated
with a given publication.
Everything works when $scope.publications.authors is set to a single
value. They do not work when multiple values are stored in an array, as
shown below.
I know that the conditional statement for the AngularJS ngShow directive
isn't the proper one to use for arrays, but I can't seem to figure out
what I actually should use.
HTML:
<div ng-repeat="person in persons" ng-show="person.firstName ==
publication.authors">{{person.firstName}}</div>
JS:
$scope.publications = [
{"title": "Research Paper",
"authors": ["Bill", "George"]};
$scope.persons = [
{"firstName": "Bill",
"lastName": "Smith"},
{"firstName": "George",
"lastName": "Jones"},
{"firstName": "Mike",
"lastName": "Thomas"};