"'t Hooft\u2013Polyakov" . . . "massive magnetic monopoles" . . "'t Hooft\u2013Polyakov monopole" . . . "'t Hooft\u2013Polyakov monopole" . "'t Hooft\u2013Polyakov magnetic monopoles" . . "monopoles" . "'t Hooft\u2013Polyakov monopole" . . .