References
- Athanasiadis N, Gerasimidis A, Panajotidis S. 2003. A palynological study in the Beles Mountains, Northern Greece. In: Tonkov S, ed. Aspects of palynology and palaeoecology, 185–198. Sofia: Pensoft.
- Bojadziev J. 2007. Absolute chronology of the Neolithic and Eneolithic cultures in the valley of Struma. In: Todorova H, Stefanovich M, Ivanov G, eds. The Struma/Strymon river valley in prehistory, 309–316. Sofia: Gerda Henkel Stiftung.
- Bronk Ramsey C. 2009. Bayesian analysis of radiocarbon dates. Radiocarbon 51: 337–360.
- Marinova E, Tonkov S, Bozilova E, Vajsov I. 2012. Holocene anthropogenic landscapes in the Balkans: The palaeobotanical evidence from south-western Bulgaria. Vegetation History and Archaeobotany 21: 413–427. doi:10.1007/s00334-011-0345-8.
- Tonkov S, Velichkov I, Popov G, Possnert G, Zlatanov T, Hinkov G. 2012. On the Holocene history of sweet chestnut forests in Belasitsa Mountain, south-western Bulgaria. Comptes rendus de l’Academie Bulgare des Sciences 65: 1549–1554.
- Velchev V, Tonkov S. 1986. Vegetation and flora of south-western Bulgaria. In: Botev B, ed. Fauna of south-western Bulgaria I, 20–43. Sofia: Bulgarian Academy of Sciences. (in Bulgarian).