diff --git a/doc/useful_addresses.html b/doc/useful_addresses.html
index 8cadf745..2bd20574 100644
--- a/doc/useful_addresses.html
+++ b/doc/useful_addresses.html
@@ -316,6 +316,10 @@ implementations. Please report any other references you have found!</p>
 	<li><a href="http://leenooks.com/163">Linux
 		hardware monitoring INcompatibility guide</a>
 		<br />A list of chips that don't work well under Linux.</li>
+	<li><a href="http://www.analog.com/library/analogDialogue/archives/38-02/fan_speed.html">Why
+		and how to control fan speed for cooling electronic equipment</a>
+		<br />A comprehensive article by Mary Burke comparing fan speed
+		control methods</li>
 	</ul>
 </li>
 </ul>