Ishaq ZOUAGHI, Amin MESMOUDI, Jorge GALICIA AUYON, Ladjel BELLATRECHE, Taoufik Aguili, Query Optimization for Large Scale Clustered RDF Data, 22nd International Workshop On Design, Optimization, Languages and Analytical Processing of Big Data, Colocated with EDBT/ICDT 2020 (DOLAP 2020), edited by Il-Yeol Song and Katja Hose and Oscar Romero, edited by CEUR-WS.org, 2020, pp. 56--65