# Detailed Inofrmation about the Quote Search
Based on the results of the database search screening, the citation search is carried out both backwards and forwards. The search criteria are applied. After the removal of duplicates, the additionally identified articles are subjected to screening again. The quote search left 41 results in total.

## Backward quote search
The reverse citation search is based on the 107 search results of the database search screening and on 14 master's theses that were excluded by the screening but are suitable for the reverse citation search. The databases in which the articles were found were used to determine the cited literature. In cases where this was not possible, a manual review of the bibliographies was carried out. This procedure yielded a total of 4,751 search results. After removing duplicates and restricting the year of publication to 2015, 2,235 search results remained. These 2,235 search results were subjected to screening. This left 25 search results.

## Forward quote search
The forward citation search is also based on the 107 search results of the database search, but the master's theses were not included as they were excluded by the screening. To ensure uniform conditions, the forward citation search was carried out using the SCOPUS database. If the article searched for was not contained in SCOPUS, Google Scholar was used as a supplement. This method led to a total of 633 search results. After removing duplicates between the results and the duplicates with the results of the database search and the reverse citation search, 293 search results remained. These 293 search results were subjected to screening. This left 16 search results.