Sources drawn from general-purpose encyclopedia articles that are not themselves the Stanford Encyclopedia of Philosophy or the Internet Encyclopedia of Philosophy, most of them longer entries from broad reference encyclopedias covering a philosopher, school, work or concept in a single dedicated article. Belongs here: standalone encyclopedia articles of reference-book length and register. Does not belong here: the two named academic philosophy encyclopedias tracked separately above, a short dictionary-style definition grouped under Encyclopedia Entry, or an unsigned crowd-sourced entry grouped under Wikipedia.