H. A. U. Nguyen, M. P. Nguyen, Q. N. Bui, T. T. N. Nguyen, C. L. Tran, and P. M. T. Vo, “SOME CHARACTERS OF ASTHMA IN CHILDREN FROM 6 MONTH TO 5 YEARS WITH INADEQUATE VITAMIN D LEVELS”, CTJUMP, no. 51, pp. 41–49, Sep. 2022.