How to read (and understand) Volume A of International Tables for Crystallography: an introduction for nonspecialists

This article explains the international notation system for space-group symmetry, using examples taken from Volume A of International Tables for Crystallography (ITA), and shows noncrystallographers, primarily biologists, how to understand and make use of the information provided in ITA.

Citations in supplementary material

The problem of undercounting of citations that are published only in supplementary material is studied for the journals Nature, Science, Cell and the Proceedings of the National Academy of Sciences (USA).