Middlebrook, W. R., & Phillips, H. (1947). The action of formaldehyde on the cystine disulphide linkages of wool: 2. The conversion of subfraction A of the combined cystine into combined lanthionine and djenkolic acid and subfraction B into combined thiazolidine-4-carboxylic acid.

Middlebrook, W. R., und H. Phillips. The Action of Formaldehyde On the Cystine Disulphide Linkages of Wool: 2. The Conversion of Subfraction A of the Combined Cystine Into Combined Lanthionine and Djenkolic Acid and Subfraction B Into Combined Thiazolidine-4-carboxylic Acid. 1947.

Middlebrook, W. R., und H. Phillips. The Action of Formaldehyde On the Cystine Disulphide Linkages of Wool: 2. The Conversion of Subfraction A of the Combined Cystine Into Combined Lanthionine and Djenkolic Acid and Subfraction B Into Combined Thiazolidine-4-carboxylic Acid. 1947.