References

  1. Krasnoselsky M.A. Some problems of nonlinear analysis. Usp. Math Nauk 1954, 9 (3), 57-114. (in Russian)
  2. Vulykh B.Z. Introduction to semiordered spaces. Fismatgiz, 1961. (in Russian)
  3. Stuart C.A. Integral equations with geareasing nonlinearitres and applications. J. Differential Equations 1975, 18 (1), 202-217. doi: 10.1016/0022-0396(75)90090-X
  4. Kurpel N.S., Shuvar B.A. Twosided operator inequalities and their application. Naukova Dumka, Kyiv, 1980. (in Russian)
  5. Shuvar B.A., Kopach M.I., Mentynskyy S.M., Obshta A.F. Two-sided approximate methods. VDV CIT, Ivano-Frankivs'k, 2007. (in Ukrainian)