Index: doc/bibliography/pl.bib
===================================================================
--- doc/bibliography/pl.bib	(revision cd477ca4b4fa70760b071f79006f06fedadef62c)
+++ doc/bibliography/pl.bib	(revision c3ed60328b05f72fcfccb65fc48edf769d56142d)
@@ -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}},
 }