Send To Tools
The buttons on both the Search Results and Abstract pages provide a tool box of additional options that can help you during your research process. These tools include E-mail and Citation manager.
Click the Email button, then fill in your email address to receive a permanent link to the article, the citation, and, if available, the full text of the article. This tool can help you keep track of articles that appear useful.
Citation Manager
If you are using a citation management tool, such as Zotero, Endnote or Mendeley, click the Send to button to access the Citation manager option. You can download one or more citations to add to your citation management program. You can export up to 10,000 citations at a time from the PubMed results page. When the Citation manager option is used on the abstract page, the action applies only to the individual citation.
Abstract Link 
In PubMed, the abstract page of each article has a unique URL that you can copy to return to the abstract page. This is different from other databases where you should not copy the URL. In other databases, the browser URL is a time-sensitive link that will break after a few hours.