Tác giả: Nguyễn Thị Mai Hương
Nhà xuất bản: SSRG International Journal of Electrical and Electronics Engineering (SSRG-IJEEE) Your Paper ID: IJEEE-V7I2P106 Volume 7 Issue 2 February issue. http://www.internationaljournalssrg.org/IJEEE/ V7I2P106.html