Xin An Ananta K. Majee Andreas Prohl Thanh Tran Optimal control for a coupled spin-polarized current and magnetization system. 28 2022 48 Adv. Comput. Math. 3 https://doi.org/10.1007/s10444-022-09947-1 db/journals/adcm/adcm48.html#AnMPT22