Table 1 Sample Selection for Systematic Literature Review

Initial sample

Samples gathered from literature databases and duplicates were removed

First step screening

Abstract screening of the selected papers with keyword relevance. Sources that are not related to LSQ were removed

Second step screening

In-depth analysis of the selected studies. Sources that had no related information about LSQ were removed

Additional sources for sample

Multiple cited sources in initially selected studies which fit to standards of the study

Final sample