[1] S.K. Berberian, Baer $*$-Rings, New York: Springer Verlag, 1972.
[2] A. Ebrahimi, On $C^*$-extreme points of the epigraph of $C^*$-affine maps, 9th National conf. on
mathematics of payame noor univ., Kerman, Iran, 2017.
[3] A. Ebrahimi, On $C^*$-extreme points of the graph of $C^*$-affine maps, 48th Annu. Iranian math.
conf., Hamedan, Iran, 2017.
[4] A. Ebrahimi Meymand and G.H. Esslamzadeh, $C^*$-convexity and $C^*$-faces in $*$-rings, Turk. J.
Math., 36 (2012), 131-145.
[5] D.R. Farenick and P.B. Morenz, $C^*$-extreme points in the generalised state spaces of a
$C^*$-algebra, Trans. Am. Math. Soc., 349, (1997), 1725-1748.
[6] D.R. Farenick and P.B. Morenz, $C^*$-extreme points of some compact $C^*$-convex sets, Proc. Am.
Math. Soc., 118 (1993), 765-775.
[7] A. Hopenwasser, R.L. Moore, and V. I. Paulsen, $C^*$-extreme points, Trans. Am. Math. Soc., 163}
(1981), 291-307.
[8] M. Kian, Epigraph of operator functions, Quaest. Math., 39(5) (2016) 587-594.
[9] R. Loebl and V.I. Paulsen, Some remarks on $C^*$-convexity, Linear Algebra Appl., 35 (1981), 63-78.
[10] B. Magajna, $C^*$-convex sets and completely bounded bimodule homomorphisms, Proc. R. Soc. Edinb.,
Sect. A, Math., 130(2) (2000), 375-387.
[11] B. Magajna, $C^*$-convexity and the numerical range, Canad. Math. Bull., 43(2), (2000), 193-207.
[12] B. Magajna, On $C^*$-extreme points, Proc. Am. Math. Soc., 129 (2000), 771-780.
[13] P.B. Morenz, The structure of $C^*$-convex sets, Canad. J. Math., 46 (1994), 1007-1026.
[14] I. Nikoufar, A note on non-unital homomorphisms on $C^*$-convex sets in $*$-rings, Acta Univ. M. Belii
Ser. Math., 39 (2016), 21-24.
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