For example, the following is a summary (selected as 100 words or less from an original document of just over 7200 words) of an article I wrote a few years ago:
Guggenheim provides a particularly problematic character for art history to consider.  Laurence Tacou-Rumney, Peggy Guggenheim: A Collector's Album (Paris and New York; Flammarion, 1996); Vail, Peggy Guggenheim.Maybe I am being harsh, since the first sentence - actually the only sentence - is a reasonable summary of my point. But how did it decide that reference 27 was the one to select as the key summary for the whole article!?
Anyway, here is a link to the original article: A Biographical Pursuit of 'Peggy Guggenheim'.