European journal of clinical chemistry and clinical biochemistry. Berlin : Walter de Gruyter, 1991-1997. Available on Internet: <https://www.ncbi.nlm.nih.gov/nlmcatalog?term=%22Eur+J+Clin+Chem+Clin+Biochem%22%5BTitle+Abbreviation%5D> ISSN 0939-4974.