From owner-freebsd-security@freebsd.org  Wed May  4 09:40:57 2016
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Date: Wed, 4 May 2016 19:25:27 +1000 (EST)
From: Ian Smith <smithi@nimnet.asn.au>
To: Poul-Henning Kamp <phk@phk.freebsd.dk>
cc: Christian Weisgerber <naddy@mips.inka.de>, freebsd-security@freebsd.org
Subject: Re: FreeBSD Security Advisory FreeBSD-SA-16:16.ntp
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On Sat, 30 Apr 2016 14:27:17 +0000, Poul-Henning Kamp wrote:

[..]

 > The best explanation of all this is John R. Vig's Quartz Tutorial
 > which is freely available on the web - highly recommended:
 > 
 > 	http://www.am1.us/Local_Papers/U11625%20VIG-TUTORIAL.pdf

This is one of the best scientific/engineering documents I've ever read;
clearly written, almost painfully thorough and, dare I say, beautiful in 
presentation.  Like a good novel, I couldn't put it aside, despite large 
swathes of it being well over my head.

Thanks!

cheers, Ian