Towards Closed-loop Automation in 5G Open RAN: Coupling an Open-Source Simulator with xApps. - Theofanis Karamplias; Sotirios T. Spantideas; Anastasios E. Giannopoulos; Panagiotis K. Gkonis; Nikolaos C. Kapsalis; Panagiotis Trakadas (EuCNC, 2022)