“…by the group of Peter van Oosterom (van Oosterom and Schenkelaars, 1995), Christine Parent, Stefano Spaccapietra, and Esteban Zimányi (Parent et al 1999;2006), (Chen and Zaniolo, 2000), during the Chorochronos project (Koubarakis et al, 2003;Breunig et al, 2003), Helmut Schäben (Schaeben et al, 2003), the groups of Sisi Zlatanova (Khuan et al, 2008;Breunig and Zlatanova, 2011;Xu and Zlatanova, 2013), Jantien Stoter (Stoter et al, 2011), Jacynthe Pouliot (Pouliot et al 2008;Zamyadi et al, 2014), Thomas Kolbe (Kolbe et al, 2008;Kolbe et al, 2011), Löwner and Becker (Löwner and Becker, 2013), Umit Isikdag (Isikdag, 2014), Alias Abdul Rahman (Duncan and Abdul Rahman, 2015;Azri et al, 2016) and by other authors.…”