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WikiPedia: Triết học tiền Socrates http://www.philosophiesauvage.com/ http://scholarship.claremont.edu/cgi/viewcontent.c... http://plato.stanford.edu/entries/presocratics/ http://www.iep.utm.edu/greekphi http://www.philosophy.gr/presocratics/index.htm http://doi.org/10.1017/CCOL0521441226.016 //tools.wmflabs.org/ftl/cgi-bin/ftl?st=wp&su=Tri%E... //tools.wmflabs.org/ftl/cgi-bin/ftl?st=wp&su=Tri%E... //tools.wmflabs.org/ftl/cgi-bin/ftl?st=wp&su=Tri%E... https://books.google.com/books?id=MfhjAAAAQBAJ