4 links
Catholic Encyclopedia: Cyrenaic School of Philosophy
newadvent.org
Overview of this strain of classical thought, by William Turner.
Internet Encyclopedia of Philosophy: Cyrenaics
iep.utm.edu
Detailed survey of this school of thought, by Tim O'Keefe.
Voula Tsouna, The Epistemology of the Cyrenaic School
ccat.sas.upenn.edu
A review by Robert Todd of this scholarly work. Published in the Bryn Mawr Classical Review in 1999.