From b7742effacd2142d8ef9b4a50589ab4304d3e40f Mon Sep 17 00:00:00 2001
From: "David A. Madore" <david+git@madore.org>
Date: Thu, 7 Feb 2013 16:27:19 +0100
Subject: Add a classical joke.

---
 ordinal-zoo.tex | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'ordinal-zoo.tex')

diff --git a/ordinal-zoo.tex b/ordinal-zoo.tex
index c2f1b2b..48659ed 100644
--- a/ordinal-zoo.tex
+++ b/ordinal-zoo.tex
@@ -66,7 +66,7 @@ neither successor nor limit.
 
 \ordinal $2$.
 
-\ordinal $42$.
+\ordinal $42$ (cf. \cite[chapter 27]{Adams1981}).
 
 \ordinal $\omega$.  This is the smallest limit ordinal, and the
 smallest infinite ordinal.
@@ -527,6 +527,9 @@ so $A \in L_\gamma$ with $\gamma$ countable, as asserted.
     Theory} (Oslo, 1972), North-Holland (1974), ISBN 0-7204-2276-0,
   5–41.
 
+\bibitem[Adams1981]{Adams1981} Douglas Adams, \textit{The Hitchiker's
+  Guide to the Galaxy}, Pocket Books (1981), ISBN 0-671-46149-4.
+
 \bibitem[Anderaa1974]{Anderaa1974} Stål Anderaa, “Inductive
   Definitions and their Closure Ordinals”, \textit{in}: Jens Erik
   Fenstad \& Peter G. Hinman (eds.), \textit{Generalized Recursion
-- 
cgit v1.2.3

