Crout, D.H.G.; Gregorio, M.V.M.; Miller, U.S.; Komatsubara, S.; Kisumi, M.; Chibata, I.
Stereochemistry of the conversions of L-threonine and D-threonine into 2-oxobutanoate by the L-threonine and D-threonine dehydratases of Serratia marcescens (1980), Eur. J. Biochem., 106, 97-105.