The European Association of Science Editors (EASE) is an internationally oriented community of individuals from diverse backgrounds, linguistic traditions and professional experience who share an interest in science communication and editing.

How to determine who should be an author of a paper?

This module describes guidelines for determining authorship in scientific writing. It presents a workable procedure for determining authorship that authors can follow during the preparation and publication of an article.

Publishing Addiction Science Chapter 8
Coin of the realm: practical procedures for determining authorship

See also:

The International Committee of Medical Journal Editors guidelines on Authorship

EASE Guidelines for Authors and Translators