EDP Sciences now offers a new service to its readers. Online references of EDP Sciences articles will progressively include direct links to:

• American Physical Society (APS) journals,
• ChemPort,
• CrossRef,
• EDP Sciences journals,
• MathSciNet, the AMS (American Mathematical Society) database,
• NASA Astrophysics Data System (ADS),
• PubMed database,
• ZentralBlatt-Math database…

Such links can be created on condition that the reference of the cited article matches a data. In particular these direct links will only concern references whose publishers have previously indexed their own data to one of the above databases.