diff --git a/dev/tools/apstats.php b/dev/tools/apstats.php
index 13e44be17ef..adb3cbe0ff9 100755
--- a/dev/tools/apstats.php
+++ b/dev/tools/apstats.php
@@ -111,6 +111,16 @@ $output_arrtd = array();
 $resexectd = 0;
 exec($commandcheck, $output_arrtd, $resexectd);
 
+
+// Count lines of code of dependencies
+$commandcheck = 'dev/tools/github_lines_perusers.sh';
+print 'Execute github_lines_perusers to count lines of code in dependencies: '.$commandcheck."\n";
+$output_arrglpu = array();
+$resexecglpu = 0;
+exec($commandcheck, $output_arrglpu, $resexecglpu);
+
+
+
 $arrayoflineofcode = array();
 $arraycocomo = array();
 $arrayofmetrics = array(
@@ -325,12 +335,18 @@ div.fiche>form>div.div-table-responsive, div.fiche>form>div.div-table-responsive
 
 $html .= '<body>'."\n";
 
+
+// Header
+
 $html .= '<header>'."\n";
 $html .= '<h1>Advanced Project Statistics</h1>'."\n";
 $currentDate = date("Y-m-d H:i:s"); // Format: Year-Month-Day Hour:Minute:Second
 $html .= '<span class="opacitymedium">Generated on '.$currentDate.' in '.($timeend - $timestart).' seconds</span>'."\n";
 $html .= '</header>'."\n";
 
+
+// Lines of code
+
 $html .= '<section class="chapter" id="linesofcode">'."\n";
 $html .= '<h2><span class="fas fa-code pictofixedwidth"></span>Lines of code</h2>'."\n";
 
@@ -408,6 +424,37 @@ $html .= '</div>';
 
 $html .= '</section>'."\n";
 
+
+// Contributions
+
+$html .= '<section class="chapter" id="projectvalue">'."\n";
+$html .= '<h2><span class="fas fa-dollar-sign pictofixedwidth"></span>Contributions</h2>'."\n";
+
+$html .= '<div class="boxallwidth">'."\n";
+
+$html .= 'TODO...';
+
+$html .= '</div>';
+
+$html .= '</section>'."\n";
+
+
+// Contributor
+
+$html .= '<section class="chapter" id="projectvalue">'."\n";
+$html .= '<h2><span class="fas fa-tasks pictofixedwidth"></span>Contributors</h2>'."\n";
+
+$html .= '<div class="boxallwidth">'."\n";
+
+$html .= 'TODO...';
+
+$html .= '</div>';
+
+$html .= '</section>'."\n";
+
+
+// Project value
+
 $html .= '<section class="chapter" id="projectvalue">'."\n";
 $html .= '<h2><span class="fas fa-dollar-sign pictofixedwidth"></span>Project value</h2>'."\n";
 
@@ -437,6 +484,9 @@ foreach ($output_arrtd as $line) {
 	}
 }
 
+
+// Technical debt
+
 $html .= '<section class="chapter" id="technicaldebt">'."\n";
 $html .= '<h2><span class="fas fa-book-dead pictofixedwidth"></span>Technical debt <span class="opacitymedium">(PHPStan level '.$phpstanlevel.' -> '.$nblines.' warnings)</span></h2>'."\n";
 
@@ -451,6 +501,9 @@ $html .= '</div>';
 
 $html .= '</section>'."\n";
 
+
+// JS code
+
 $html .= '
 <script>
 $(document).ready(function() {
@@ -465,6 +518,7 @@ $( ".seedetail" ).on( "click", function() {
 $html .= '</body>';
 $html .= '</html>';
 
+// Output report into a HTML file
 $fh = fopen($outputpath, 'w');
 if ($fh) {
 	fwrite($fh, $html);
diff --git a/dev/tools/github_lines_perusers.sh b/dev/tools/github_lines_perusers.sh
index 6386ff28675..86f28b70ede 100755
--- a/dev/tools/github_lines_perusers.sh
+++ b/dev/tools/github_lines_perusers.sh
@@ -6,17 +6,21 @@
 # shellcheck disable=2002,2086,2268
 
 if [ "x$2" = "x" ]; then
-	echo "Usage: $0  origin/branchstart|tagnamestart|START  origin/branchend|tagnameend|HEAD"
+	echo "***** github_lines_perusers.sh *****"
+	echo "Return the number of lines of code produced by each contributor between 2 versions"
+	echo "Usage:   $0  origin/branchstart|tagnamestart|START  origin/branchend|tagnameend|HEAD"
+	echo "Example: $0  origin/18.0 origin/19.0"
 	exit
 fi
 
-START=$1
+START="$1.."
 if [ "x$START" = "xSTART" ]; then
 	START=""
 fi
 
-echo "git log $START..$2 --shortstat | grep ... | perl ... > /tmp/github_lines_perusers.tmp"
-git log $START..$2 --shortstat | grep -e 'Author:' -e 'Date:' -e ' changed' -e ' insertion' -e ' deletion' | perl -n -e '/^(.*)$/; $line = $1; if ($line =~ /(changed|insertion|deletion)/) { $line =~ s/[^0-9\s]//g; my @arr=split /\s+/, $line; $tot=0; for (1..@arr) { $tot += $arr[$_]; }; print $tot."\n"; } else { print $line."\n"; };' > /tmp/github_lines_perusers.tmp
+echo "git log $START$2 --shortstat | grep ... | perl ... > /tmp/github_lines_perusers.tmp"
+git log $START$2 --shortstat | grep -e 'Author:' -e 'Date:' -e ' changed' -e ' insertion' -e ' deletion' | perl -n -e '/^(.*)$/; $line = $1; if ($line =~ /(changed|insertion|deletion)/) { $line =~ s/[^0-9\s]//g; my @arr=split /\s+/, $line; $tot=0; for (1..@arr) { $tot += $arr[$_]; }; print $tot."\n"; } else { print $line."\n"; };' > /tmp/github_lines_perusers.tmp
 
-cat /tmp/github_lines_perusers.tmp | awk 'BEGIN { FS="\n"; print "user and nb of lines"; lastuser=""; } { if ($1 ~ /Author:/) { lastuser=$1 }; if ($1 ~ /^[0-9]+$/) { aaa[lastuser]+=$1; } } END { for (var in aaa) print var," ",aaa[var]; } '
+echo "Users and nb of lines";
+cat /tmp/github_lines_perusers.tmp | awk 'BEGIN { FS="\n"; lastuser=""; } { if ($1 ~ /Author:/) { lastuser=$1 }; if ($1 ~ /^[0-9]+$/) { aaa[lastuser]+=$1; } } END { for (var in aaa) print var," ",aaa[var]; } '
 
