Delta: A Modular Ontology Evaluation System. - Haridimos Kondylakis; Nikolaos Astyrakakis; Dimitra Papatsaroucha; Anastasios Koumarelis; Emmanouel Kritikakis; Kyriakos Kalkanis; Iraklis Skepasianos; Stylianos Klados; Nikos Papadakis (Inf., 2021)