Digital Scholarship has released the Altmetrics Bibliography, which includes over 50 selected English-language articles and technical reports that are useful in understanding altmetrics.
The "altmetrics" concept is still evolving. In "The Altmetrics Collection," Jason Priem, Paul Groth, and Dario Taraborelli define altmetrics as follows:
Altmetrics is the study and use of scholarly impact measures based on activity in online tools and environments. The term has also been used to describe the metrics themselves—one could propose in plural a "set of new altmetrics." Altmetrics is in most cases a subset of both scientometrics and webometrics; it is a subset of the latter in that it focuses more narrowly on scholarly influence as measured in online tools and environments, rather than on the Web more generally.
Sources have been published from January 2001 through September 2013.
The bibliography includes links to freely available versions of included works. If such versions are unavailable, italicized links to the publishers' descriptions are provided.
It is available under a Creative Commons Attribution-Noncommercial 3.0 United States License.