Specific Rules #5 for Date of Conference (optional) to Citing Conference Proceedings Vancouver Style: No date for the conference can be found

If no date can be found on which the conference was held, but a location for the conference is given, omit date information and follow the conference title with a semicolon and the place of the conference.

If neither a date nor a location can be found for the conference, end the conference title with a period.

Forestieri P, Mazzeo F, Varoux G, editors. Il carcinoma gastrico. SICO 1st Consensus Conference. Naples (Italy): Giuseppe de Nicola Editore; 2000. 190 p. Italian.

Según:

Citing Medicine: The NLM Style Guide for Authors, Editors, and Publishers [Internet]. 2nd edition. Chapter 3: Conference Publications

Related:

General Rules for Date of Conference (optional) to Citing Conference Proceedings Vancouver Style

Specific Rules #1 for Date of Conference (optional) to Citing Conference Proceedings Vancouver Style: Dates cross months

Specific Rules #2 for Date of Conference (optional) to Citing Conference Proceedings Vancouver Style: Dates cross years

Specific Rules #3 for Date of Conference (optional) to Citing Conference Proceedings Vancouver Style: Non-English names for months

Specific Rules #4 for Date of Conference (optional) to Citing Conference Proceedings Vancouver Style: Seasons instead of months

Specific Rules #5 for Date of Conference (optional) to Citing Conference Proceedings Vancouver Style: No date for the conference can be found

Example Entries for Date of Conference (optional) to Citing Conference Proceedings Vancouver Style