Index: doc/bibliography/pl.bib
===================================================================
--- doc/bibliography/pl.bib	(revision 50f3f3a9d7d9a31f9505218fbc4fcd8398431e95)
+++ doc/bibliography/pl.bib	(revision efdd18cb86b35dfd17a92e94494ea3c0fc7c6f8d)
@@ -2136,5 +2136,5 @@
     address	= {Eindhoven, Neth.},
     year	= 1965,
-    optnote	= {Reprinted in \cite{Genuys68} pp. 43--112.}
+    optnote	= {Reprinted in \cite{Genuys68} pp. 43--112.},
     note	= {\url{https://pure.tue.nl/ws/files/4279816/344354178746665.pdf}},
 }