See:
- Oikonomidis Stavros, Papayiannis Aristeides, Tsonos Akis: The Emergence and the Architectural Development of the Tumulus Burial Custom in NW Greece (Epirus and the Ionian Islands) and Albania and its Connections to Settlement Organization. In: Ancestral Landscape. Burial mounds in the Copper and Bronze Ages (Central and Eastern Europe – Balkans – Adriatic – Aegean, 4th-2nd millennium B.C.) Proceedings of the International Conference held in Udine, May 15th-18th 2008. Lyon : Maison de l'Orient et de la Méditerranée Jean Pouilloux, 2012. pp. 185-201. (Travaux de la Maison de l'Orient et de la Méditerranée. Série recherches archéologiques, 58)-www.persee.fr/doc/mom_2259-4884_2012_act_58_1_3461