HI Tsai, I used EndNote 4.0.2 and Mathematica 9 or 10. I don't recall exactly. It worked great. I found that citation would use a new reference number for reused citations and would not build the Bibliography correctly after using an updated version of Mathematica. With Mathematica 13.0.1, EndNote 4 no long responds properly. I use Zotero now and created a bibtex file. Mathematica 10-13 just gives an error message when reading my bibtex file. I think it get errors when tittles use LaTeX equations. I haven't been able to track it down even with the help of text support. It's disappointing since it a very useful function when it works.