Search for "zwitterions" in Full Text gives 30 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2012, 8, 2156–2165, doi:10.3762/bjoc.8.243
Beilstein J. Org. Chem. 2011, 7, 386–393, doi:10.3762/bjoc.7.49
Beilstein J. Org. Chem. 2010, 6, No. 32, doi:10.3762/bjoc.6.32
Beilstein J. Org. Chem. 2010, 6, No. 31, doi:10.3762/bjoc.6.31
Beilstein J. Org. Chem. 2010, 6, No. 3, doi:10.3762/bjoc.6.3