--- biblex.l.orig	2004-09-23 15:05:41.000000000 -0600
+++ biblex.l	2007-05-03 11:45:26.000000000 -0600
@@ -115,7 +115,7 @@
 %a		3000
 %o		6000
 				/* abbrev, entry, key, field name syntax */
-N		[A-Za-z][-A-Za-z0-9:.+/']*
+N		[A-Za-z0-9][-A-Za-z0-9:.+/']*
 					/* BibTeX entry opening delimiter */
 O		[({]
 					/* one white space character */