Alonso, J.M. and Garrido-Pertierra, A. (1982). „Carboxymethylhydroxymuconic semialdehyde dehydrogenase in the 4-hydroxyphenylacetate catabolic pathway of Escherichia coli”. Biochim. Biophys. Acta719: 165-167. PMID6756482.
Garrido-Pertierra, A. and Cooper, R.A. (1981). „Identification and purification of distinct isomerase and decarboxylase enzymes involved in the 4-hydroxyphenylacetate pathway of Escherichia coli”. Eur. J. Biochem.117: 581-584. PMID7026235.