The literature database RI-Opac ( R egesta I mperii) currently (December 2019) offers over 2.4 million title references, primarily on the medieval history of the entire European area.
In addition to the literature cited directly in the publications of the Regesta Imperii , the RI-Opac provides evidence of overlapping, but above all, titles on the medieval history of the entire European area. The dependent literature (including articles from the Historical Journal (HZ), the communications of the Institute for Austrian Historical Research (MIÖG), the Journal for Historical Research (ZHF), the Journal for the History of the Upper Rhine (ZGO) and articles are particularly deep on commemorative and collective publications). The evidence is provided with links to the KVK , digital copies, e.g. from magazines, are also linked, as far as the editors are aware of them.
- RI OPAC now with over 2.4 million titles ; Further information: Yannik Pultar, Kornelia Holzner-Tobisch: Regesta Imperii (sources on the history of the empire). Report on the status and the continuation of the work in 2018. In: German Archives for Research into the Middle Ages 74 (2018), pp. 721–732.