Identifier for this specification is: https://identifiers.org/combine.specifications:sbgn.er.level-1.version-1.2

Version 1.2 of Level 1 of the SBGN Entity Relationship Language was published on 14 April 2011.

The specification can be found at:

• sbgn.er.level-1.version-1.2.pdf
• http://dx.doi.org/10.1038/npre.2011.5902.1
• https://sourceforge.net/p/sbgn/code/HEAD/tree/EntityRelationship/tags/Level1-Version1.2/sbgn_ER-level1.pdf

To cite this document use:

Nicolas Le Novère, Emek Demir, Huaiyu Mi, Stuart Moodie, Alice Villéger. Systems Biology Graphical Notation: Entity Relationship language Level 1, Version 1.2. Available from COMBINE https://identifiers.org/combine.specifications:sbgn.er.level-1.version-1.2 (2011)