Search for "9,9’-spirobifluorene" in Full Text gives 4 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2018, 14, 1459–1481, doi:10.3762/bjoc.14.124
Beilstein J. Org. Chem. 2016, 12, 1401–1409, doi:10.3762/bjoc.12.134
Beilstein J. Org. Chem. 2014, 10, 825–831, doi:10.3762/bjoc.10.78
Beilstein J. Org. Chem. 2014, 10, 432–441, doi:10.3762/bjoc.10.40