Nodal lines and nodal loops in non-symmorphic odd-parity superconductors
  We discuss the nodal structure of odd-parity superconductors in the presence of non-symmorphic crystal symmetries, both with and without spin-orbit coupling, and with and without time reversal symmetry. We comment on the relation of our work to previous work in the literature, and also the implications for unconventional superconductors such as UPt$_3$. 
T. Micklitz and M. R. Norman
cond-mat.supr-con