Björn's Guide To Philosophy - Plato (Plato, c. 429-347 BC)
Brill's new Pauly, 2 May 2012 (Plato, Πλάτων, 428 or 427-348 or 347 B.C.)
Cresson, A. Platon ... 1941.
Encyclopedia Britannica (Plato b. about 428 B.C., d. 347 B.C.)
Glucker, J. Pirḳe mavo le-Aplaṭon, 1985 t.p. (Aplaṭon)
Google, 02-06-02 top-biography.com/0010-Plato/index2 (Plato, Plato was born in the spring of year 427 BC, in the island of Agina, near Athens. His father was Ariston. His mother was Perictone who belonged to the highly esteemed family of Solon, the early Greek philosopher; he died 347 B.C.)