Yan Wang 0074 Aimin Song Lei Wang 0035 Jie Sun 0001 Maximum principle via Malliavin calculus for regular-singular stochastic differential games. 1301-1314 2018 12 Optim. Lett. 6 https://doi.org/10.1007/s11590-017-1120-2 db/journals/ol/ol12.html#WangSWS18