CellML 1.1 has been frozen on 28 February 2006.
The specification can be found at: http://www.cellml.org/specifications/cellml_1.1
Identifier for this specification is: https://identifiers.org/combine.specifications:cellml.1.1
To cite this document use:
Autumn Cuellar, Poul Nielsen, Matt Halstead, David Bullivant, David Nickerson, Warren Hedley, Melanie Nelson, Catherine Lloyd. CellML 1.1 Specification. Available from COMBINE https://identifiers.org/combine.specifications:cellml.1.1 (2006)