Every reference with a DOI in the deposited reference list resolved to a known
work in Crossref or DataCite at the dated check, and none carried a retraction,
withdrawal, or removal notice.
11 without a DOI — not checked. A reference
deposited without a DOI is never matched by title or guessed at; it stays outside the checked
set, and this line discloses that.
Indirect Spectrophotometric Determination of Ammonia.
The 11 references without a DOI — listed, not checked
no DOI — not checkedM. Fleischmann, R. E. W. Jansson, G. A. Ashworth and P. J. Ayre, Brit. Prov. Pat. No. 18305, April 1974.
no DOI — not checkedG. A. Ashworth, Ph.D. Thesis, Southampton University (1977).
no DOI — not checkedR. E. W. Jansson and G. A. Ashworth,Electrochim. Acta (to be published).
no DOI — not checkedG. A. Ashworth, P. J. Ayre and R. E. W. Jansson,Chem. Ind. (1975) 385.
no DOI — not checkedG. A. Ashworth and R. E. W. Jansson,J. Appl. Electrochem. (1977) 309.
no DOI — not checkedI. H. Justinijanovic, Ph.D. Thesis, Southampton University (1974).
no DOI — not checkedJ. Ghoroghchian and R. E. W. Jansson, unpublished work.
no DOI — not checkedG. A. Ashworth and R. E. W. Jansson,Electrochim. Acta (to be published).
no DOI — not checkedF. Beck, Proc. I.U.P.A.C. Conference, Hamburg, September 1973.
no DOI — not checkedR. E. W. Jansson and R. J. Marshall,Chem. Eng. (315) November (1976).
no DOI — not checkedR. E. W. Jansson and N. Tomov,Chem. Eng. (to be published).
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