8Franczyk,Thaddeus. Process to prepare amino carboxylize held salts via copper- transition - metal catalyzed oxidation of aloohols US5 367112,1994.
9Grierson Jeffrey G, Costain Cameron T,Wilson David A. Preparation of mino carboxyllc acid solution with low salt content from solution of alkali metal salt of the acid. US 5491259,1996.
10Grewal,N.S.et al, IntJ.Heat Mass Transer,1980,123:1505-1519.