1. T. Radul, “On the functor of order-preserving functionals,” Comm. Math. Univ. Carol., 39, No.3, 609–615 (1998).
2. A. A. Zaitov, “On categorical properties of the functor of order-preserving functionals,” Methods Funct. Anal. Topology, 9, No.4, 357–364 (2003).
3. R. B. Beshimov, “On weakly additive functionals,” Mat. Stud., 18, No.2, 179–186 (2002).
4. A. A. Zaitov, “Some properties of spaces of alternating measures and the functor of weakly additive normed order-preserving functionals,” Ph. D. Theses, Tashkent (2004).