“…There are different types of documents that have been used in the current expert finding systems studies. The most used textual expertise source is publications, which have been used by authors in [36,38,44,48,49,53,58,59,61,62,[66][67][68][70][71][72][73]80] as their main expertise source, while publications have been combined with other expertise sources in [22,40,41,43,44,47,55,60,69,75,88,89]. In addition to publications, reference [42] used movies as expertise evidence.…”