4 links
John Scotus Eriugena
newadvent.org
Article from the Catholic Encyclopedia by William Turner. Recounts this scholar's life and influence, and evaluates his teachings and length.
Notes on John Scotus Eriugena
people.bu.edu
By Andrew Irvine, from his reading of this medieval thinker.
Stanford Encyclopedia of Philosophy: John Scottus Eriugena
plato.stanford.edu
Article exposing the thinker's biography, ideas and bibliography.
The Mystery of God in John Scotus Eriugena
medio-evo.org
Outline of this thinker's system, in the context of early Irish spirituality.