@inproceedings{1018434,
    title = "Protagoras on the unseen: the evidence of Didymus",
    author = "Woodruff, Paul",
    year = "1984",
    pages = "80-87",
    publisher = "Καρδαμίτσα",
    booktitle = "Η αρχαία σοφιστική"
}