Search for "carboxylic acid reductase" in Full Text gives 2 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2015, 11, 2245–2251, doi:10.3762/bjoc.11.243
Beilstein J. Org. Chem. 2011, 7, 1622–1635, doi:10.3762/bjoc.7.191