“…Missing articles are only discovered post factum and regardless of what is done, corrections to citations and IF are infrequent (e.g., Kellner & Azevedo 2013, Kellner 2020c). The database presented by WoS, while also susceptible to miss articles (Kellner 2020b), has at least been corrected and papers (apparently also citations) can be (re)included. It should be noted, however, that it is still unclear how and if the citations added retroactively are indeed correct.…”