diff --git a/articles/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation.xopp.xml b/articles/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation.xopp.xml
index 3e832c8..d817a69 100644
--- a/articles/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation.xopp.xml	
+++ b/articles/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation.xopp.xml	
@@ -1948,6 +1948,45 @@ have not achieved improvements as authors, right?</text>
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@@ -1982,6 +2021,17 @@ have not achieved improvements as authors, right?</text>
       <text font="Sans" size="11.00000000" x="312.11756340" y="438.97829411" color="#00c0ffff" ts="0" fn="">do they provide the MATLAB code?
 No interesting occurrences of code, source (code), git,
 implementation, web</text>
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+      <text font="Sans" size="12.00000000" x="459.73004944" y="174.25554168" color="#00c0ffff" ts="0" fn="">how?</text>
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