Select the citations you want then click Send To and add them to the clipboard.
From the clipboard, you can click Send To again and choose citation manager.
PubMed will only export 200 citations at a time, but it does allow you to select which citation to start with. For instance you can start at 201 if you have already exported the 1st 200 citations.
When you go to import your citation file into RefWorks, you have to select NLM PubMed as the import filter
Exporting Citations from ARTstor
Click on the image below to watch screencast that reviews the steps needed to export citations from the ARTstor database, which is not as intuitive as other databases available from the K-State Libraries.