ΠΑΠΑΔΟΠΟΥΛΟΥ ΒΡΥΝΙΩΤΗ Κ., and ΜΠΕΛΛΟΣ Θ. “Geomorphological Observation in Karst Landforms in the Mountains of Parnassos - Helikon - Giona (Greece)”. Bulletin of the Geological Society of Greece, vol. 34, no. 1, Jan. 2001, pp. 439-42, doi:10.12681/bgsg.17047.