Search for "selective direct fluorination" in Full Text gives 2 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2014, 10, 1213–1219, doi:10.3762/bjoc.10.119
Beilstein J. Org. Chem. 2011, 7, 1048–1054, doi:10.3762/bjoc.7.120