diff --git a/.gitignore b/.gitignore
index ae584c1ae604d85045720d673b5847634b30c47a..f03e1decdb34d97c8b6b2d67ed6846dab31973ed 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ HY-CS-main.run.xml
 HY-CS-main.synctex.gz
 HY-CS-main.toc
 msc_english_contents.aux
+.DS_Store
diff --git a/HY-CS-main.tex b/HY-CS-main.tex
index 5dfd188474a0b0c468461c306824223ba1498819..04c3644ef42028adb60233d7078d846cee9101be 100644
--- a/HY-CS-main.tex
+++ b/HY-CS-main.tex
@@ -36,7 +36,7 @@
 
 %% Reference style: select one 
 %% for APA = Harvard style = authoryear -> (Einstein, 1905) use:
-\usepackage[style=authoryear,bibstyle=authoryear,backend=biber,natbib=true,maxnames=99,maxcitenames=2,giveninits=true,uniquename=init]{biblatex}
+\usepackage[style=authoryear,bibstyle=authoryear,backend=biber,natbib=true,maxnames=99,maxcitenames=2,uniquelist=minyear,giveninits=true,uniquename=mininit]{biblatex}
 %% for numeric = Vancouver style -> [1] use:
 %\usepackage[style=numeric,bibstyle=numeric,backend=biber,natbib=true,maxbibnames=99,giveninits=true,uniquename=init]{biblatex}
 %% for alpahbetic -> [Ein05] use: