The phrase "copious references" means having a large number or abundance of sources or citations. It suggests that there are many different places from which information has been gathered or ideas have been borrowed.
Sentences with «copious references»
His book, The Primal Blueprint, goes into the details of these rules in considerable depth, backed up with copious references, and various interesting forays into sidelines that help illuminate the main material (in one sidebar, he discusses why going barefoot during exercise can strengthen feet, improve strength, and reduce injury risk). (paleodietnews.com)
These paintings are best when they aren't defined by copious references to Modernist painting. (artfcity.com)
The relevant pages in Fyfe have copious references to original German and Latin texts. (religion-online.org)