To export article citations to EndNote, select the articles whose citations you want to export, and click on the “Export to EndNote” button that appears in the pane on the right.
To select multiple articles hold the “Control” key on a PC or the “Command” key on a Mac.
If you would like to select only a single article, click on the small gear wheel in the upper right-hand corner of the app and click the “Export to EndNote” option. You will either be prompted to select the library in which you would like your bibliographic info to appear or be asked to save the citations as a text file, which you can then select to import from within EndNote.
ReadCube also supports export to .ris and .bib (BibTeX) formats, which are compatible with most reference managers.