pyafm/auxiliary.tex: Add an 'and' for the last Z-N tuning rule

diff --git a/src/pyafm/auxiliary.tex b/src/pyafm/auxiliary.tex
index 9ca8cf44da4b2703b09bf4af72ae69f22ed0be46..c956d408df918b18bc3a4e19dbcfe58c1d13a80f 100644 (file)
--- a/src/pyafm/auxiliary.tex
+++ b/src/pyafm/auxiliary.tex
@@ -202,7 +202,7 @@ sensitive systems is not trivial.  There are a number of tuning
 procedures which characterize the system by evaluating its response
 under simpler driving conditions.  The \pypid\ package implements
 Ziegler--Nichols' step response\citep{ziegler42}, bang-bang response,
-ultimate cycle response\citep{ziegler42} tuning rules, as well as
+and ultimate cycle response\citep{ziegler42} tuning rules, as well as
 Cohen--Coon's\citep{cohen53} and Wang--Juang--Chan's\citep{wang95}
 step response tuning rules\citep{astrom93}.