Barbariol, F. et al. 2021. Ultrasound diaphragmatic excursion during non-invasive ventilation in ICU: a prospective observational study. Acta Biomedica Atenei Parmensis. 92, 3 (Jul. 2021), e2021269. DOI:https://doi.org/10.23750/abm.v92i3.11609.