Jalba, MS (2008). "Three generations of ongoing controversies concerning the use of short acting beta-agonist therapy in asthma: a review". The Journal of Asthma. 45 (1): 9–18. doi:10.1080/02770900701495512. PMID18259990.
Jalba, MS (2008). "Three generations of ongoing controversies concerning the use of short acting beta-agonist therapy in asthma: a review". The Journal of Asthma. 45 (1): 9–18. doi:10.1080/02770900701495512. PMID18259990.