(2012). volume 134. test, 134(0), 1-346. doi: 10.21608/erj.2012.226147
. "volume 134". test, 134, 0, 2012, 1-346. doi: 10.21608/erj.2012.226147
(2012). 'volume 134', test, 134(0), pp. 1-346. doi: 10.21608/erj.2012.226147
volume 134. test, 2012; 134(0): 1-346. doi: 10.21608/erj.2012.226147