Search for "isotopes" in Full Text gives 29 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2013, 9, 1285–1295, doi:10.3762/bjoc.9.145
Beilstein J. Org. Chem. 2013, 9, 1012–1044, doi:10.3762/bjoc.9.116
Beilstein J. Org. Chem. 2013, 9, 342–391, doi:10.3762/bjoc.9.39
Beilstein J. Org. Chem. 2012, 8, 1172–1184, doi:10.3762/bjoc.8.130