“…Research focused on personal techniques purposed by the authors have been published since 2005. Airan and Born [11] and Kane [12] wrote the first articles ever about this topic, both in 2005; technique refinement and new trends have been published in 2006 [22,23] , 2007 [24,33] , 2011 [16,32,76] , 2012 [26,41,42,66] , 2013 [73] , 2014 [43] , 2015 [48][49][50] , 2016 [27,28] , 2017 [17,52] , 2018 [19,71,74] and 2019 [21] .…”