Search for "protonation equilibrium" in Full Text gives 4 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2020, 16, 2598–2606, doi:10.3762/bjoc.16.211
Beilstein J. Org. Chem. 2020, 16, 818–832, doi:10.3762/bjoc.16.75
Beilstein J. Org. Chem. 2018, 14, 1961–1971, doi:10.3762/bjoc.14.171
Beilstein J. Org. Chem. 2011, 7, 1732–1738, doi:10.3762/bjoc.7.203