Enigmail and p≡p are partnering [online]. 2015-09-07. Dostupné online.
mozilla.org
mail.mozilla.org
Patrick Brunschwig on the Thunderbird Planning mailing list about to emerging availability of Enigmail/p≡p. [online]. [Cit. 2016-10-17]. Dostupné online. Archivované 2016-10-09 z originálu.
Patrick Brunschwig on the Thunderbird Planning mailing list about to emerging availability of Enigmail/p≡p. [online]. [Cit. 2016-10-17]. Dostupné online. Archivované 2016-10-09 z originálu.