http://h34nug3iwqjf2376fmmzdhgqivckzemcujmarlptfqeqtq7vya47yyad.onion/page/17/index.html
If you add new papers manually, you have a multitude of possibilities for configuring the input - from basics such as the kind of BibTeX entry (article, book, IEEE, PhDThesis, Unpublished, …) over all the usual BibTeX data (authors, editors, journal, publication date, pages, ISBN, publisher, institution, …) to more advanced information such as keywords, abstracts, digital object identifiers ( DOI ), associated URLs and PDF files, and entirely user-defined fields.