School of Applied Mathematics and Informatics University of Science and Technology Vien Toan ung dung va Tin hoc hoc Bach khoa Hanoi 1DaiCoViet;
Department of Mathematics of Information Technology university Khoa Cong nghe Thong tin mon Toan hoc Thuy loi Tay Son Da Noi Nam;
Thuyloi University hoc Thuy Loi Tay Son Da Nam;
Boussinesq systems; periodic solutions; almost periodic solutions; unbounded domains; smoothing estimates; dual estimates; interpolation spaces; STABILITY;