Tony R. Kuphaldt. "23. Introduction to Continuous Analytical Measurement". Lessons In Industrial Instrumentation. Control Automation. Retrieved 28 March 2022.
West, P. W.; Gaeke, G. C. (1 December 1956). "Fixation of Sulfur Dioxide as Disulfitomercurate (II) and Subsequent Colorimetric Estimation". Analytical Chemistry. 28 (12): 1816–1819. doi:10.1021/ac60120a005. eISSN1520-6882. ISSN0003-2700.
Ohlwein, Simone; Kappeler, Ron; Kutlar Joss, Meltem; Künzli, Nino; Hoffmann, Barbara (21 February 2019). "Health effects of ultrafine particles: a systematic literature review update of epidemiological evidence". International Journal of Public Health. 64 (4): 547–559. doi:10.1007/s00038-019-01202-7. eISSN1661-8564. ISSN1661-8556. PMID30790006. S2CID67791011.
Ohlwein, Simone; Kappeler, Ron; Kutlar Joss, Meltem; Künzli, Nino; Hoffmann, Barbara (21 February 2019). "Health effects of ultrafine particles: a systematic literature review update of epidemiological evidence". International Journal of Public Health. 64 (4): 547–559. doi:10.1007/s00038-019-01202-7. eISSN1661-8564. ISSN1661-8556. PMID30790006. S2CID67791011.
Ohlwein, Simone; Kappeler, Ron; Kutlar Joss, Meltem; Künzli, Nino; Hoffmann, Barbara (21 February 2019). "Health effects of ultrafine particles: a systematic literature review update of epidemiological evidence". International Journal of Public Health. 64 (4): 547–559. doi:10.1007/s00038-019-01202-7. eISSN1661-8564. ISSN1661-8556. PMID30790006. S2CID67791011.
West, P. W.; Gaeke, G. C. (1 December 1956). "Fixation of Sulfur Dioxide as Disulfitomercurate (II) and Subsequent Colorimetric Estimation". Analytical Chemistry. 28 (12): 1816–1819. doi:10.1021/ac60120a005. eISSN1520-6882. ISSN0003-2700.
Ohlwein, Simone; Kappeler, Ron; Kutlar Joss, Meltem; Künzli, Nino; Hoffmann, Barbara (21 February 2019). "Health effects of ultrafine particles: a systematic literature review update of epidemiological evidence". International Journal of Public Health. 64 (4): 547–559. doi:10.1007/s00038-019-01202-7. eISSN1661-8564. ISSN1661-8556. PMID30790006. S2CID67791011.