“…This remarkable paper of Mathews constructed another important bridge between the domain theory in computer sciences and fixed point theory in mathematics (see [40]). Later on, many researchers studied fixed point theorems in partial metric spaces, particularly Oltra-Valero [36,2004], Rus [39,2008],Ćirić et al [15,2011], Romaguera [38,2012], Aydi et al [4,2012].…”