deletions | additions       diff --git a/introduction_1.tex b/introduction_1.tex  index 86143fe..52c5012 100644  --- a/introduction_1.tex  +++ b/introduction_1.tex 
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\cite{agno_Courrioux_Joly_Ledru_2008}  \cite{10.1190/1.3119263} \cite{Fregoso_Gallardo_2009}  XXXXX