Art. 13 CISG
For the purposes of this Convention "writing" includes telegram and telex.
The Secretariat Commentary does not adress Article 13 CISG, since there was no equivalent provision in the 1978 New York Draft, which formed the basis for the Secretariat Commentary.
CISG-AC Opinion regarding Art. 13 CISG
Overview of case law on Art. 13 CISG: UNCITRAL Digest
The UNCITRAL Digest on the CISG can be used as a starting point to discover the relevant case law on this article.