Almeida, E.P. de, Duarte, M.C., Montessi, J., Cocate, A.A., Almeida, F.F., Gomes, C.A. and Ferreira, L.E.V. de C. 2016. Activity of alpha amylase in the tracheobronchial secretions of patients without morbid salivary aspiration. Journal of Research in Biology. 6, 2 (Feb. 2016), 1959-1966.