Publications of Keyser, P.T.

Somfai A. Calcidius. In: Keyser PT, Irby-Massie GL, editors. The encyclopedia of ancient natural scientists : the Greek tradition and its many heirs. London: Routledge; 2008. p. 203-4.
Somfai A. Isidore of Seville. In: Keyser PT, Irby-Massie GL, editors. The encyclopedia of ancient natural scientists : the Greek tradition and its many heirs. London: Routledge; 2008. 445.
Betegh G. Stesimbrotus Derveni author. In: Keyser PT, Irby-Massie GL, editors. The encyclopedia of ancient natural scientists : the Greek tradition and its many heirs. London: Routledge; 2008.