“…One can refer, among others, to Nelson (1982), Lawless (1982), Cohen and Whitten (1988), , Balakrishnan and Cohen (1991), Viveros and Balakrishnan (1994), Sandhu (1995, 1996), Aggarwala and Balakrishnan (1997), Balakrishnan et al (2001a,b), Bairamov and Eryilmaz (2005), and Balakrishnan and Stepanov (2008). To the best of our knowledge, the Progressive type-II censoring in the bivariate case was addressed only in Balakrishnan and Kim (2005), and Bairamov (2006).…”