VAN AN L. GENERALIZED HYERS-ULAM -RASSISA STABILITY OF AN ADDITIVE β1, β2 -FUNCTIONAL INEQUALITIES WITH THREE VARIABLES IN COMPLEX BANACH SPACE. m [Internet]. 2022Sep.22 [cited 2024Dec.1];8(9):1-14. Available from: http://545406.voltageenergyhk.tech/index.php/m/article/view/5269