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Speusippus
Article from the Stanford Encyclopedia of Philosophy by Russell Dancy. Reviews in depth what is known about his life and doctrines.
Speusippus
Brief entry from the 2001 Columbia Encyclopedia.
The Unwritten Doctrines: Plato's Answer to S
An essay by John Pepple, arguing that Plato's later works include a response to Speusippus' rejection of the Platonic forms.