Search for "triplet diradical" in Full Text gives 3 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2011, 7, 813–823, doi:10.3762/bjoc.7.93
Beilstein J. Org. Chem. 2011, 7, 113–118, doi:10.3762/bjoc.7.16
Beilstein J. Org. Chem. 2010, 6, 810–822, doi:10.3762/bjoc.6.91