9Noppen M, Vanmaele L, Lmpens N, et al. Bronchodiating effect of in-travenous magnesium sulfate in acute severe bronchial asthma[J]. Chest, 1990,97: 373-376.
10Bloch H, Silverman R, Mancherje N, et al. Intravenous magnesium sulfate as an adjunct in the treatment of acute asthma[J]. Chest, 1995,107(6) : 1576- 1581.