Binh, N., 		Tuan, N., & 		Binh, N.
(2005).
 Devolopment of a spectrometry system using lock - in amplification technique.
<em>VNU Journal Of Science: Mathematics - Physics, 21</em>(2).
Retrieved from <a href="https://js.vnu.edu.vn/MaP/article/view/2335" target="_new">https://js.vnu.edu.vn/MaP/article/view/2335</a>