QUYET, Nguyen Dinh; THI, Hoang Van.
The controllability of degenerate system described by invertible operator.
VNU Journal of Science: Mathematics - Physics, [S.l.], v. 18, n. 3, sep. 2002.
ISSN 2588-1124.
Available at: <https://js.vnu.edu.vn/MaP/article/view/3316>. Date accessed: 05 dec. 2024.