Bottema, Sytze (1974): Late Quaternary vegetation history of northwestern Greece. PhD Thesis, University of Groningen, The Netherlands, 190 pp, http://irs.ub.rug.nl/ppn/811117227
Bottema, Sytze (1982): Palynological investigations in Greece with special reference to pollen as indicator of human activity. Palaeohistoria, 24, 257-289