CP Violating Form Factors for Three Gauge Boson Vertex in the Two Higgs   Doublet and Left-Right symmetric Models
  In this paper we calculate the one loop contributions to the CP violating three gauge boson couplings in two-Higgs doublet and Left--Right symmetric models. In the two-Higgs doublet model only a P conserving and CP violating coupling is generated, and it can be large as $10^{-3}$. In the Left--Right symmetric model both P conserving and violating couplings are generated. Due to constraints on the $W_L$--$W_R$ mixing, these couplings are small. 
X. G. He, J. P. Ma and B. H. J. McKellar