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-rw-r--r--ordinal-zoo.tex5
1 files changed, 4 insertions, 1 deletions
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