Ontology-Based IoT Middleware Approach for Smart Livestock Farming toward Agriculture 4.0: A Case Study for Controlling Thermal Environment in a Pig Facility. - Symeonaki, Eleni; Arvanitis, Konstantinos G.; Piromalis, Dimitrios; Tseles, Dimitrios; Balafoutis, Athanasios T. (Agronomy, 2022)