Pham Thanh, Luan, 		Hang, Nguyen, 		Thanh, Do, AND 		Minh, Le.
" Using the  Directional Analytic Signals of  Magnetic Gradient Tensor  to Determine Boundaries of Source" <em>VNU Journal of Science: Mathematics - Physics</em> [Online], Volume 33 Number 4 (25 December 2017)