[1] DIXMIER J.:
Les C*-algébres et leurs représentations. Gauthier-Villars Éditeur, Paris, 1969.
MR 0246136
[2] EFFROS E.:
Order ideals in C*-algebra and its dual. Duke Math. J. 30 (1963), 391-412.
MR 0151864
[3] FUCHS L.:
Riesz groups. Ann. Scuola Norm. Sup. Pisa CI. Sci. (3) 3(19) (1965), 1-34.
MR 0180609
[4] JAKUBÍKOVÁ M.:
O nekotorych podgrupach l-grup. Mat.-fyz. čas. 12 (1962), 97-107.
MR 0162869
[6] PEDERSEN G.:
A decomposition theorem for C*-algebras. Math. Scand. 22 (1968), 266-268.
MR 0253062
[7] RACHŮNEK J.:
Directed convex subgroups of ordered groups. Acta Univ. Palack. Olomouc. Fac. Rerum Natur. Math. 41 (1973), 39-46.
MR 0357273
[8] RIESZ F.:
Sur quelques notion fondamentales dans la theorie generate des operations lineaires. Ann. of Math. (2) 41 (1940), 174-206.
MR 0000902
[9] STORMER E.:
Two-sides ideals in C*-algebras. Bull. Amer. Math. Soc. 73 (1976), 254-257.
MR 0208400
[10] ŠMARDA B.:
Polarity on C*-algebras. Math. Slovaca 40 (1990), 133-142.
MR 1094769