“…Chartrand et al (1988) first introduced Irregular labeling in 1988, which developed very rapidly since then. Various types of irregular labeling such as VITL (Anholcer et al, 2009;Bača et al, 2007;Indriati et al, 2016;Baskoro et al, 2010), EITL (Anholcer and Palmer, 2012;) Indriati et al, 2013), totally ITL (Indriati et al, 2020;Marzuki et al, 2013), DVIL (Bong et al, 2017;Novindasari et al, 2016;Slamin, 2017;Sugeng et al, 2021;Susanto et al, 2022a;Susanto et al, 2022b), andDVITL (Wijayanti et al, 2021;Wijayanti et al, 2023). Wijayanti et al ( 2021) define the basic concept of DVITL and tdis(G) and also research some necessary and sufficient conditions for the existence of DVITL (Wijayanti et al, 2023) .…”