Luu, Thuy Chung, Thanh Binh Dinh, Thi Phuong Mai Nguyen, and Hong Tuan Pham. 2019. “Determination of Temperature Gradient and Spectrum in the Mold’s Core and Wall by Solving the Differential Equations Using Wolfram Mathematica Software”. Old Journal, no. 135B (June):18-22. https://jst.vn/index.php/old/article/view/636.