Wikipedia references

According to: http://www.zotero.org/blog/zotero-wikipedia-perfect-together/ it is possible to import references from a Wikipedia article (e.g. Matsuiski, M. & Endo, T. (1969) from http://en.wikipedia.org/wiki/Rainflow-counting_algorithm). However, I don't find any icon for import.

Can anyone please inform me what is wrong?
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