A note on “Some inequalities in inner product spaces related to the generalized triangle inequality” by S.S. Dragomir et al.
Tài liệu tham khảo
Dragomir, 2011, Some inequalities in inner product spaces related to generalized triangle inequality, Appl. Math. Comput., 217, 7462, 10.1016/j.amc.2011.02.046