Гарднер М. Шифр Бэкона // Научно-популярный физико-математический журнал «Квант». – 1992. – № 8. – С. 21–26.
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Dickens Ch. Letter to W. Sandys 13.6.1847. – The letters of Charles Dickens, edited by his sister-in-law and his eldest Daughter. Leipzig, B. Tauchnits, 1880, vol. 1, p. 190.
