Upper critical field of p-wave ferromagnetic superconductors with   orthorhombic symmetry
  We extended the Scharnberg-Klemm theory of $H_{c2}(T)$ in p-wave superconductors with broken symmetry to cases of partially broken symmetry in an orthorhombic crystal, as is appropriate for the more exotic ferromagnetic superconductor UCoGe in strong magnetic fields. For some partially broken symmetry cases, $H_{c2}(T)$ can mimic upward curvature in all three crystal axis directions, and reasonably good fits to some of the UCoGe data are obtained. 
Richard A. Klemm, Christopher L\"orscher, Jingchuan Zhang, and Qiang   Gu
cond-mat.supr-con cond-mat.str-el