diff --git a/content/staff/tikhomirov.md b/content/staff/tikhomirov.md
index 0db2147..0d5d0e5 100644
--- a/content/staff/tikhomirov.md
+++ b/content/staff/tikhomirov.md
@@ -86,7 +86,7 @@ lab: "Лаборатория математики и телекоммуника
   <ol>
     <li>
       A. N. Tikhomirov. «On the Limiting Distribution of the Spectra of Random Block Matrices».
-      <a href="/static/pdf/tikhomirov/2025/2025_mathematics-13-02056-v2.pdf" target="_blank" rel="noopener">PDF</a>
+      <a href="/static/pdf/tikhomirov/2025/2025_mathematics-13-02056-v2.pdf" target="_blank" rel="noopener" class="publication-pdf">PDF</a>
     </li>
 
   </ol>
@@ -95,7 +95,7 @@ lab: "Лаборатория математики и телекоммуника
   <ol>
     <li>
       A. Tikhomirov, S. Gulyaeva, D. Timushev. «Limit Theorems for Spectra of Circulant Block Matrices with Large Random Blocks».
-      <a href="/static/pdf/tikhomirov/2024/2024_mathematics-12-02291.pdf" target="_blank" rel="noopener">PDF</a>
+      <a href="/static/pdf/tikhomirov/2024/2024_mathematics-12-02291.pdf" target="_blank" rel="noopener" class="publication-pdf">PDF</a>
     </li>
 
   </ol>
@@ -104,7 +104,7 @@ lab: "Лаборатория математики и телекоммуника
   <ol>
     <li>
       A. N. Tikhomirov, V. V. Ulyanov. On the Special Issue «Limit Theorems of Probability Theory».
-      <a href="/static/pdf/tikhomirov/2023/2023_mathematics-11-03665.pdf" target="_blank" rel="noopener">PDF</a>
+      <a href="/static/pdf/tikhomirov/2023/2023_mathematics-11-03665.pdf" target="_blank" rel="noopener" class="publication-pdf">PDF</a>
     </li>
 
   </ol>