Ancient Greek Scientists: Xenocrates of Chalcedon, Biography.com: Xenocrates, Columbia Encyclopedia: Xenocrates, FOLDOC: Xenocrates, Life of Xenocrates, MacTutor History of Mathematics: Xenocrates of Ch, Wikipedia: Xenocrates, Xenocrates

Internet Encyclopedia of Philosophy: Xenophanes, The Homeric Gods and Xenophanes' Opposing The, Xenophanes of Colophon, Xenophanes: Fragments and Commentary

Works, Hsun Tzu, The History of the Xunzi Text, The School of Hsun Tzu, Xun Kuang, Xunzi and the Ancient Chinese Philosophical Debate