Search for "phosphine-boranes" in Full Text gives 3 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2020, 16, 362–383, doi:10.3762/bjoc.16.35
Beilstein J. Org. Chem. 2018, 14, 2354–2365, doi:10.3762/bjoc.14.211
Beilstein J. Org. Chem. 2014, 10, 1064–1096, doi:10.3762/bjoc.10.106