ABI specification

[herrBez]

https://media.readthedocs.org/pdf/solidity/develop/solidity.pdf

Although there is a common agreement on the ABI format, this abstraction is not part
of the core Ethereum protocol meaning that anyone can define and expose its own ABI,
but the caller have to comply to the format used by the callee.

I would add the reference to the solidity docs (it has a chapter about the specification)

[gfornari]

Ok, but just as an example

[herrBez]

I would simply write

Although there is a common agreement on the ABI format~\cite{solidity}...

[gfornari]

Good