Johan Helsingius (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Johan Helsingius" in English language version.

refsWebsite

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2books.google.com

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books.google.com

Steven Levy (8 January 2001). Crypto: How the Code Rebels Beat the Government--Saving Privacy in the Digital Age. Penguin Publishing Group. ISBN 978-0-14-024432-8.
Andy Greenberg (13 September 2012). This Machine Kills Secrets: Julian Assange, the Cypherpunks, and Their Fight to Empower Whistleblowers. Penguin Publishing Group. ISBN 978-1-101-59358-5.

december.com

Helmers, Sabine (September 1997). "A Brief History of anon.penet.fi - The Legendary Anonymous Remailer". Computer-Mediated Communication Magazine. ISSN 1076-027X. Retrieved 8 January 2016.

nytimes.com

Lewis, Peter (6 September 1996). "Behind an Internet Message Service's Close". New York Times. Retrieved 8 January 2016.

time.com

content.time.com

QUITTNER, Joshua (September 16, 1996), "REQUIEM FOR A GO-BETWEEN", Time.com

wired.com

Quittner, Joshua (1 June 1994). "Anonymously Yours- An Interview with Johan Helsingius". Wired Magazine. Retrieved 8 January 2016.

worldcat.org

search.worldcat.org

Helmers, Sabine (September 1997). "A Brief History of anon.penet.fi - The Legendary Anonymous Remailer". Computer-Mediated Communication Magazine. ISSN 1076-027X. Retrieved 8 January 2016.