diff --git a/tex/_introduction.tex b/tex/_introduction.tex
index ff87361..d0e1c9f 100644
--- a/tex/_introduction.tex
+++ b/tex/_introduction.tex
@@ -87,6 +87,9 @@ \section{Introduction}
 dubbed Ising superconductivity, has been previously studied
 for heavily doped $p$-type and $n$-type TMDs
 \cite{%
+  Lu1353,%
+  Xi2016,%
+  Saito2016,%
   PhysRevB.93.180501,%
   PhysRevLett.113.097001%
 },