Gunawan, Gunawan. “OPERATOR SELF ADJOINT PADA RUANG HILBERT”. UJMC (Unisda Journal of Mathematics and Computer Science) 1, no. 01 (March 1, 2018): 21-27. Accessed July 3, 2024. https://e-jurnal.unisda.ac.id/index.php/ujmc/article/view/400.