  We apply the on-shell tree-level recursion relations of Britto, Cachazo, Feng
and Witten to a variety of processes involving internal and external massive
particles with spin. We show how to construct multi-vector boson currents where
one or more off-shell vector bosons couples to a quark pair and number of
gluons. We give compact results for single vector boson currents with up to six
partons and double vector boson currents with up to four partons for all
helicity combinations. We also provide expressions for single vector boson
currents with a quark pair and an arbitrary number of gluons for some specific
helicity configurations. Finally, we show how to generalise the recursion
relations to handle massive particles with spin on internal lines using $gg \to
t\bar t$ as an example.
