Koufos, G.D. 2012. New material of Chalicotheriidae (Perissodactyla, Mammalia) from the Late Miocene of Axios Valley, Macedonia (Greece) with the description of a new species. Annales de Paléontologie 98 (3): 203–224.
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Kostopoulos, D.S.; Koufos, G.D.; Vlachou, Th.D. 2009. The Late Miocene mammal fauna of Samos, Greece – The mammalian fauna and its homogeneity. Abstr. book of 13th Congr. of the Reg. Committee on Mediterranean Neogene Stratigraphy (RCMNS) “Earth System Evolution and the Mediterranean Area", Acta Naturalia de “L’Ateneo Parmense”, Parma: 45 (1): 289-290.
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Koufos, G.D. 2006. The large mammals from the Miocene/Pliocene locality of Silata, Macedonia, Greece with implications about the Latest Miocene palaeoecology. Beiträge zur Paläontologie, Wien; 30: 293–313.
Koufos, G.D. 1981. A new Late Pleistocene (Würmian) mammal locality from the Basin of Drama (Northern Greece). Science Annals (Fac. of Physics & Mathematics), Univ. of Thessaloniki 21: 129-148, Pl I-fig 3..