In the citation helper, I searched for "Lectures on the approach to Iwasawa theory for Hasse-Weil L-functions via BdR". The unique result that shows up is the following (I've only edited two occurrences of \(...\) to $...$; there is a separate feature request asking for this to be automated):

Kato, Kazuya, Lectures on the approach to Iwasawa theory for Hasse-Weil $L$-functions via $B_{dR}$, Colliot-Thélène, Jean-Louis et al., Arithmetic algebraic geometry. Lectures given at the 2nd session of the Centro Internazionale Matematico Estivo (C.I.M.E.), held in Trento, Italy, June 24 - July 2, 1991. Berlin: Springer-Verlag. Lect. Notes Math. 1553, 50-163 (1993). ZBL0815.11051.

The link over the title should be the DOI link to the paper: https://doi.org/10.1007/BFb0084729. Instead, it points to a MathOverflow answer that has a link to the zbMATH review above.

In fact, the DOI of this paper is currently not indexed on its zbMATH review page. So, I presume that that is why the citation helper mistakenly picks up the link to the MathOverflow answer instead.

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    $\begingroup$ We are reworking some of the citation helper. Thanks for reporting, we'll look into that. $\endgroup$
    – Asaf Karagila Mod
    May 2, 2023 at 12:28
  • 1
    $\begingroup$ This happens to me repeatedly as well (usually pointing to works I have cited before; not sure if it is because I manually add DOI's). Some affected books are Fulton's Intersection theory, Hartshorne's Algebraic geometry, Neukirch's Algebraic number theory, Beauville's Complex algebraic surfaces, Katz's Review of $\ell$-adic cohomology, Goerss–Jardine's Simplicial homotopy theory, and (many authors') FGA Explained. These examples are all from the past three weeks. $\endgroup$ May 6, 2023 at 22:12


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