Bellone, A., Motta, L., Etteri, M., Bianchi, A.M., Cappelletti, A., Bossi, I., Guanziroli, M., Pina, P. and Colombo, L. 2014. Ventimask in exacerbation of chronic obstructive pulmonary disease and mild acidosis before starting with bilevel positive airway pressure. Emergency Care Journal. 10, 2 (Nov. 2014). DOI:https://doi.org/10.4081/ecj.2014.3754.