diff --git a/201 Metadata/My Library.bib b/201 Metadata/My Library.bib
index e06d791f9..b042c7db4 100644
--- a/201 Metadata/My Library.bib	
+++ b/201 Metadata/My Library.bib	
@@ -7011,7 +7011,8 @@ Regulatory Premises.pdf}
   urldate = {2024-11-11},
   eventtitle = {{{AIAA Scitech}} 2021 {{Forum}}},
   isbn = {978-1-62410-609-5},
-  langid = {english}
+  langid = {english},
+  file = {/home/danesabo/Zotero/storage/IR3BDVLE/Lang et al. - 2021 - Formal Verification Applied to Spacecraft Attitude Control.pdf}
 }
 
 @online{LangleyFormalMethods,