Koutles, Th., A. Kassoli-Fournaraki, A. Filippidis, y A. Tsirambides. 1995. «Geology and Geochemistry of the Eocene Zeolite Bearing Volcaniclastic Sediments of Metaxades, Thrace, Greece». Estudios Geológicos 51 (1-2):19-27. https://doi.org/10.3989/egeol.95511-2280.