I exported my .bib file from EndNote into LaTeX. However, there is no citation key for references. Do I have to add citation keys (manually) for each reference to be able to cite them within my document?
If the objective is simply to include each and every entry in the bib file(s) mentioned in the
\bibliography instruction, regardless of whether or not they are
\cited explicitly somewhere in your document, simply issue the command
somewhere in the body of the document, i.e., somewhere between