1. High content of hydroxycinnamic acids esterified with (±)-d-malic acid in the upper parts of Fumaria officinalis;Hahn;Planta Med.,1993
2. Van der Werf, M. J. Production of d-malate by maleate hydratase of Pseudomonas pseudoalcaligenes. Ph.D. thesis, Division of Industrial Microbiology, Wageningen Agricultural University, 1994
3. Chirality in industry-An overview;Crosby,1992
4. Syntheses of enantiomerically pure compounds (EPC syntheses). Tartaric acid, an ideal source of chiral blocks for syntheses?;Seebach,1980
5. New enantioselective synthesis of 4-hydroxy-2-oxopyrrolidine-n-acetamide (oxiracetam) from malic acid;Almeida;Tetrahedron: Asymmetry,1992