1. Spectrophotometric determination of pyrocatechol, resorcinol and phloroglucinol with potassium iodate in dilute nitric acid;Beg;Analyst,1977
2. Spectrophotometric determination of catechol via extraction of iron complexes with liquid ion exchangers;Berenguer Navarro;Fres. Z. Anal. Chem.,1975
3. Spectrophotometric determination of pyrocatechin;Berenguer Navarro;Inform. Quim. Anal.,1973
4. Compendium of Analytical Nomenclature—Definite Rules 1987,1987