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.