Search for "diastereoselective protonation" in Full Text gives 3 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2022, 18, 167–173, doi:10.3762/bjoc.18.18
Beilstein J. Org. Chem. 2011, 7, 151–155, doi:10.3762/bjoc.7.21
Beilstein J. Org. Chem. 2009, 5, No. 43, doi:10.3762/bjoc.5.43