Sidney Redner’s analysis of citation statistics appears well thought out, but the assumption that the number of Physical Review citations to other Physical Review papers is even an “approximate proxy of scientific quality” is dubious at best. One nice example is Felix Bloch’s 1954 paper showing that sample rotation during a nuclear magnetic resonance measurement can greatly increase the spectral resolution.
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According to PROLA, the Physical Review Online Archive, Bloch’s paper has been cited in PR a total of six times. However, his result is routinely used for all high-resolution NMR and is the parent for many other developments in the field. I do not think this example is isolated.
The Week in Physics" is likely a reference to the regular updates or summaries of new physics research, such as those found in publications like Physics Today from AIP Publishing or on news aggregators like Phys.org.