Search for "phosphonic acid" in Full Text gives 30 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2011, 7, 364–368, doi:10.3762/bjoc.7.46
Beilstein J. Org. Chem. 2010, 6, 766–772, doi:10.3762/bjoc.6.95
Beilstein J. Org. Chem. 2010, 6, No. 63, doi:10.3762/bjoc.6.63
Beilstein J. Org. Chem. 2009, 5, No. 72, doi:10.3762/bjoc.5.72
Beilstein J. Org. Chem. 2006, 2, No. 2, doi:10.1186/1860-5397-2-2