Anomalous angular dependence of the upper critical induction of orthorhombic ferromagnetic superconductors with completely broken $p$-wave symmetry

We calculate the angular dependence of the upper critical field, $H_{c2}(\theta,\phi,T)$, for an orthorhombic ferromagnetic superconductor with a general ellipsoidal Fermi surface with effective masses $m_{1}$, $m_{2}$, and $m_{3}$, in which we have $p$-wave parallel-spin pairing that is locked onto the $z$-axis direction. We report anomalous angular dependence of $H_{c2}$ for fixed $3