Search for "NHC-borane" in Full Text gives 4 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2017, 13, 267–284, doi:10.3762/bjoc.13.30
Beilstein J. Org. Chem. 2014, 10, 150–154, doi:10.3762/bjoc.10.12
Beilstein J. Org. Chem. 2013, 9, 675–680, doi:10.3762/bjoc.9.76
Beilstein J. Org. Chem. 2010, 6, 709–712, doi:10.3762/bjoc.6.82