“…Taking into account, the above-mentioned studies and analysing the results of the papers, Ashchepkov (1972), Ashchepkov (1973), Ashchepkov (1987), Ahlbrandt (1993), Arutyunov and Marinkovic (2005), Bellman (2003), Boltyanskii (1978), Butkovskii (1963), Dzyuba and Pshenichniy (1975), Dubovitskii (1978), Dolezal (1988), Ferreira and Vidal (1986), Fan and Wan (1967), Gabasov (1968), Gabasov and Gusakova (1971), Gabasov and Kirillova (1969), Gabasov, Kirillova, and Mordukhovich (1973), Gabasov, Kirillova, and Mordukhovich (1993), Gaishun (1996), Gaishun (2001), Gorokhovik (1985), Marinković (2009), Gorokhovik, Gorokhovik, andMarinković (2013), Gorokhovik and Simonov (1998), Gurman (1976), Halkin (1966), Hilscher and Zeidan (2002), Holtzman and Halkin (1966), Jakson and Horn (1965), Jordan and Polak (1964), Malanowski (1991), Mansimov (2013), Mardanov and Melikov (2014), Marinković (2006), Marinković (2007), Marinković (2008), Minchenko (1976), Mordukhovich (1973), Mordukhovich (1988a), M...…”