Pei, L., & 		Chen, F.
(2018).
 Sucient, necessary and i conditions of the stability of the coecients-time-varying linear system with time delays.
<em>International Journal Of Novel Ideas: Mathematics (No More Publication Since 2019), 2</em>, 1-13.
Retrieved from <a href="https://sci-en-tech.com/IJNI/index.php/Math/article/view/116" target="_new">https://sci-en-tech.com/IJNI/index.php/Math/article/view/116</a>