3Andreas S.Bommarius,Karlheina Drauz,Kurt Gunther,et al.L-Methionine related L-amino acides by acylase cleavage of their corresponding N-acety-DL-derivatives,T etrahedron:Asymmetry,1997,19(8):3197-3200
4Herbert L.Holland,Frances M Brown.Biocatalytic and chemical preparation of all four diastereomers of methionine sulfoxide,Tetrahedron:Asymmetry,1998(9):535-538