diff --git a/ObscoreTimeExtension.tex b/ObscoreTimeExtension.tex
index 361ed90..1d2f25e 100644
--- a/ObscoreTimeExtension.tex
+++ b/ObscoreTimeExtension.tex
@@ -1,7 +1,7 @@
 \documentclass[11pt,a4paper]{ivoa}
 \input tthdefs
 %\usepackage[table]{xcolor}
-%\usepackage{todonotes}
+\usepackage{todonotes}
 
 \usepackage{listings}
 \definecolor{mygreen}{rgb}{0,0.6,0}
@@ -123,6 +123,7 @@ \section*{Conformance-related definitions}
 infrastructure that enable VO applications.
 
 
+
 \section{Introduction}
 
 Time domain astronomy studies astrophysical phenomenae that vary in different time stamps and hence, in order to study the different physical underlying mechanisms a user might need to collect and analyse data from different missions and of different nature. Therefore she/he needs to search across various archives based on time related criteria.
@@ -552,7 +553,7 @@ \subsubsection{ t\_fold\_period,  t\_fold\_phaseReference}
 
  If this table contains an identifier for the corresponding dataset described in main \emph{ivoa.obscore} table, then it is easy to join  general Obscore properties to the time specific ones in an ADQL query.
  Here is a query  example :  ( to be checked) 
- \begin{lstlisting} [language=SQL, caption= Query example for Join between the main ObsCore table and the Time extension table]
+ \begin{lstlisting} [language=SQL, caption= Query example with  a JOIN between the main ObsCore table and the Time extension table]
 
  SELECT obs_id, t_min, t_max, obs_publisher_did, obs_collection, access.reference FROM ivoa.obscore 
  WHERE dataproduct_type=='light-curve'
@@ -577,7 +578,7 @@ \subsubsection{ t\_fold\_period,  t\_fold\_phaseReference}
 
 % NOTE: IVOA recommendations must be cited from docrepo rather than ivoabib
 % (REC entries there are for legacy documents only)
-\section{References}
+%\section{References}
 \bibliography{ivoatex/ivoabib, ivoatex/docrepo, ivoatex/myref}
  % note:TSSerialisationNote
 
@@ -587,7 +588,7 @@ \section{References}
  
 
 \section{Query examples for join tables}\label{sec:query_examples}
-
+\todo{Other examples of join and uses cases}
 
 \section{Previous work on the Time series characterization and description}.