References: http://eds.a.ebscohost.com/ehost/detail/detail?sid=02259164-7683-4c28-9e91-ee3bedecea79%40sessionmgr4001&vid=0&hid=4203&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#db=a9h&AN=99345167 (EBSCO Host)
References: http://eds.a.ebscohost.com/ehost/detail/detail?sid=02259164-7683-4c28-9e91-ee3bedecea79%40sessionmgr4001&vid=0&hid=4203&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#db=a9h&AN=99345167 (EBSCO Host)