--- a/thesis/bib/thesis.bib	Sun Jan 04 17:55:21 2009 +0100
+++ b/thesis/bib/thesis.bib	Sun Jan 04 17:55:34 2009 +0100
@@ -149,7 +149,7 @@
 
 
 % fixme: literature kind
-@misc{lifewithqmail,
+@unpublished{lifewithqmail,
 	author = "Dave Sill",
 	title = "\emph{Life with qmail}",
 	year = "2007",
@@ -233,7 +233,7 @@
 	howpublished = "On the Internet: {\small\url{http://oreillynet.com/lpt/a/6849} (2008-12-11)}",
 }
 
-@article{bernstein01,
+@unpublished{bernstein01,
 	author = "Daniel~J. Bernstein",
 	title = "\emph{Internet host SMTP server survey}",
 	year = "2001",
@@ -243,7 +243,7 @@
 }
 
 
-@article{venema:postfix-growth,
+@misc{venema:postfix-growth,
 	author = "Wietse Venema",
 	title = "\emph{The Postfix mail server as a secure programming example}",
 	year = "FIXME",
@@ -341,3 +341,18 @@
 	note = "On the Internet: {\small\url{} (2009-01-04)}",
 }
 
+@unpublished{wheeler03,
+	author = "David~A.\ Wheeler",
+	title = "\emph{Countering Spam with Ham-Authenticated Email and the Guarded Email Protocol}",
+	year = "2003",
+	howpublished = "On the Internet: {\small\url{http://www.dwheeler.com/guarded-email/guarded-email.html} (2009-01-04)}",
+}
+
+@techreport{back02,
+	author = "Adam Back",
+	title = "\emph{Hashcash -- A Denial of Service Counter-Measure}",
+	year = "2002",
+	month = "August",
+	howpublished = "On the Internet: {\small\url{http://hashcash.org/papers/hashcash.pdf} (2009-01-04)}",
+}
+

--- a/thesis/bib/websites.bib	Sun Jan 04 17:55:21 2009 +0100
+++ b/thesis/bib/websites.bib	Sun Jan 04 17:55:34 2009 +0100
@@ -209,9 +209,9 @@
 
 
 
-misc{wikipedia:exim,
-	author = "Wikipedia",
-	title = "\emph{Exim}",
-	howpublished = "On the Internet: {\small\url{} (2008-11-26)}",
+@misc{hashcash:homepage,
+	author = "Adam Back",
+	title = "\emph{Hashcash.org}",
+	howpublished = "On the Internet: {\small\url{http://hashcash.org} (2009-01-04)}",
 }