[1] SFSafariViewController user agent | Apple Developer Forums (2017-03-30 13:44:03 +09:00) https://forums.developer.apple.com/thread/12986

[2] SFSafariViewControllerとSafariがcookieを共有しているかの調査 - しめ鯖日記 ( (2017-05-29 01:54:51 +09:00)) http://llcc.hatenablog.com/entry/2017/04/18/195327

[3] SFSafariViewController - SafariServices | Apple Developer Documentation (2017-10-09 13:23:52 +09:00) https://developer.apple.com/documentation/safariservices/sfsafariviewcontroller