Šperlingová, I., Dabrowská, L., Stránský, V., Kučera, J., Tichý, M. Preliminary study to prepare a reference material of styrene metabolites – mandelic acid and phenolglyoxilic acid – in human urine. Accreditation and Quality Assurance. 2003, 8(3-4), 113-116. ISSN 0949-1775. E-ISSN 1432-0517.