An algorithm to find a basis of the space of complex secondary classes of transversely holomorphic foliations is given. The mapping which relates the real secondary classes to the complex secondary classes is completely described when the complex codimension of the foliation is either two or three. Finally, it is shown that the image of real secondary classes under this mapping is naturally reduced under a certain condition.
"On the real secondary classes of transversely holomorphic foliations. II." Tohoku Math. J. (2) 55 (3) 361 - 374, 2003. https://doi.org/10.2748/tmj/1113247479