Update index.html

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@@ -409,7 +409,7 @@ MindBigData2022_MNIST_MW</a> [217Mb] </td>
 		mdpi </a> 2025</td>
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-		👏 (also interesting review of methods congrats) </span></td>
+		👏<a href="https://github.com/avgoustos/EEG-Signal-Analysis-for-Numerical-Digit-Classification-Methodologies-and-Challenges"> Sources </a> (also interesting review of methods congrats) </span></td>
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