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.
6 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.
Modified carrageenan 3. Synthesis of a novel polysaccharide-based superabsorbent hydrogel via graft copolymerization of acrylic acid onto kappa-carrageenan in air
Preparation of modified polyacrylamide hydrogels and application in removal of Cu(II) ion
The 6 references without a DOI — listed, not checked
no DOI — not checkedLiu Y.;Bai B.;Shuler P. J.Presented at the SPE/DOE Symposium on Improved Oil Recovery; Tulsa OK April 22–26 2006.
no DOI — not checkede_1_2_7_8_2
no DOI — not checkedBai B.;Huang F.;Liu Y.;Seright R. S.;Wang Y.Presented at the 2008 SPE Improved Oil Recovery Symposium; Tulsa OK April 21–23 2008.
no DOI — not checkede_1_2_7_10_2
no DOI — not checkedWang H. G.;Guo W. K.;Jiang H. F.Presented at the SPE International Symposium on Oilfield Chemistry; Houston TX February 13–16 2001.
no DOI — not checkede_1_2_7_29_2
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.