Anthropologist Božina Ivanović considered that the development of the Montenegrin Dinaric variety was influenced by gracilisation and brachycephalisation; they have characteristics which were not found in other Slavic and non-Slavic European populations, nor morphological properties from paleo-anthropological series originating from the Slavic necropolis from other South Slavic area. Also, the brachycephalisation and width of the face in the last five centuries is growing in Montenegrin, while among other Slavic and European communities decreasing, showing anthropological issues in Montenegro have deeper roots and broader scientific importance. Montenegrin historian Dragoje Živković (1989) noted that modern multidisciplinary research disagrees with older consideration how Sklavinias and Slavic states had ethnical identification, example Serb ethnos, until the 12th century. Slavs mixing with native population (in case of Komani culture necropolis in Pukë) made a new cultural-historical drift of Albanian-Illyrian and Slavic built upon extinct and present La Tène, Greek-Illyrian, Illyrian-Roman, and Byzantine. He argued that the Slavs from Duklja promptly blended in social-economical of the natives who historically had a more developed society, as was in their interest to approach the Roman-Illyrian natives.