Respitawulan, R., Pangestu, Q. Y. ., Kusniyanti, E., Yuliawan, F. and Astuti, P. . (2023) “On The Adjoint of Bounded Operators On A Semi-Inner Product Space”, Journal of the Indonesian Mathematical Society, 29(3), pp. 311–321. doi: 10.22342/jims.29.3.1598.311-321.