diff --git a/LD/book.md b/LD/book.md
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--- a/LD/book.md
+++ b/LD/book.md
@@ -1,6 +1,6 @@
 ### book
 #### Semantic Web 
 - Семантический веб Григорис Антониоу, Паул Грос, Фрэнк ван Хармелен, Ринке Хоекстра  
-A Semantic Web Primer (Cooperative Information Systems) Grigoris Antoniou, Frank vanHarmelen [фрагмент](https://content.e-bookshelf.de/media/reading/L-23447088-5750c7709b.pdf)
+[фрагмент](https://content.e-bookshelf.de/media/reading/L-23447088-5750c7709b.pdf)
 https://books.google.ru/books/about/%D0%A1%D0%B5%D0%BC%D0%B0%D0%BD%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9_%D0%B2%D0%B5%D0%B1.html?id=Bc5SEAAAQBAJ&redir_esc=y
-
+  - A Semantic Web Primer (Cooperative Information Systems) Grigoris Antoniou, Frank vanHarmelen [link](https://www.semanticscholar.org/paper/A-semantic-web-primer-Antoniou-Harmelen/cb700d53e6be65063d0523b4beba317edaf68bb9)