VAN, Nguyen Thanh.
The extention problem for a linear system of partial differential equations with function coefficients.
VNU Journal of Science: Natural Sciences and Technology, [S.l.], v. 16, n. 3, sep. 2000.
ISSN 2588-1140.
Available at: <https://js.vnu.edu.vn/NST/article/view/3434>. Date accessed: 29 apr. 2024.
