1. Ahuja K.R., Magnanti O., Orlin J.B.: Networks Flows: Theory, Algorithms and Applications. A Simon & Schuster Company, Prentice Hall (1993)
2. Chen, S., Nahrstedt, K.: On finding multi-constrained paths. In: Proc. of IEEE International Conference on Communications, Atlanta, pp. 874–879 (1998)
3. Cochran W.G.: Sampling Techniques, 3rd edn. Wiley, New York (1977)
4. Dalenius T., Hodges J.L. Jr: Minimum variance stratification. Skandinavisk Aktuarietidskrift 54, 88–101 (1959)
5. Gunning P., Horgan J.M.: A new algorithm for the construction of stratum boundaries in skewed populations. Surv. Methodol. 30, 159–166 (2004)