It is always recommended that you follow the default steps set up by your citation manager of choice, i.e. using the Zotero connector web browser extension for Zotero; however, it is possible to export a RIS file and then import/upload it into your citation manager of choice.
Each item record will have an Export RIS option. This is not a direct export, you will need to import/upload the RIS file into your citation manager of choice.
If you select multiple records from your search result list, you can click the three dot menu to pull up Export RIS for the selected records. This does not work as well as doing it individually.