Search for "triphenylphosphine oxide" in Full Text gives 28 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2011, 7, 1648–1655, doi:10.3762/bjoc.7.194
Beilstein J. Org. Chem. 2010, 6, 1043–1055, doi:10.3762/bjoc.6.119
Beilstein J. Org. Chem. 2008, 4, No. 49, doi:10.3762/bjoc.4.49