Internet Encyclopedia of Philosophy: Diogenes Lae
Concise article on this ancient biographer.
Lives of the Philosophers
Online text of C.D. Yonge's translation.
Notes on Diogenes Laertius
A criticism of this author's reliability, based on his Life of Socrates.
The Manuscripts of "The Lives and Opinions of
Hicks' notes from his 1925 translation of this text.
Wikipedia: Diogenes Laertius
Article drawing on the 1911 Britannica.