1. REGIETHEATER – THE BIG CHALLENGE FOR THE OPERA OF OUR TIMES. Authors: CRISTINA RADU-GIURGIU.2. A PERSPECTIVE ON THE OPERA AUDIENCE OF THE 21ST CENTURY. Authors: CRISTINA RADU-GIURGIU.3. EXPLORING LEARNING AND UNLEARNING IN SINGING TECHNIQUE (BREATH). Authors: CRISTINA RADU-GIURGIU.