Cyclic amino acid salts as catalysts for the asymmetric Michael reactionLaars, Marju; Raska, Henri; Lopp, Margus; Kanger, TõnisTetrahedron : asymmetry2010 / p. 562-565 Flick dietRaska, HenriStudioosus2012 / lk. 22 https://www.ester.ee/record=b1558644*est