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.
9 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.
A Perspective on the Selective Catalytic Reduction (SCR) of NO with NH<sub>3</sub> by Supported V<sub>2</sub>O<sub>5</sub>–WO<sub>3</sub>/TiO<sub>2</sub> Catalysts
The 9 references without a DOI — listed, not checked
no DOI — not checkedA review on various after treatment techniques to reduce NOx emissions in a CI engine
no DOI — not checkedModel-based control system design in a urea-SCR aftertreatment system based on NH3 sensor feedback
no DOI — not checkedCritical review of nitrogen monoxide sensors for exhaust gases of lean burn engines
no DOI — not checkedSimulation of a NOx sensor for model-based control of exhaust aftertreatment systems
no DOI — not checked〈http://www.lambdasensor.cn/〉, 2021.
no DOI — not checkedT. Sekiya, N. Saito, S. Kageyama, Gas Sensor, US20150276659A1, 2015.
no DOI — not checked10.1016/j.snb.2022.131622_bib45
no DOI — not checked10.1016/j.snb.2022.131622_bib46
no DOI — not checked10.1016/j.snb.2022.131622_bib47
What this badge says. CiteStamped means the CHECKABLE references of this
work were clean at the dated check: each resolved to a known work in a public registry, and none
carried a retraction notice at that time. It says nothing about the quality, findings,
or importance of the work itself, and nothing about references deposited without a DOI.
checked 2026-07-23 — re-checked daily as this page is visited;
titles and statuses come from Crossref and DataCite and are not part of the signed record
Both snippets point at the live badge image and link back to this page. The
badge re-renders from the daily check, so an embed never goes stale by more than a day of visits.