References
- Nickel S, Puerto J. Location theory – a unified approach. Berlin: Springer-Verlag; 2005.
- Pallaschke D, Urbański R. Pairs of compact convex sets – fractional arithmetic with convex sets. vol. 548. Mathematics and its applications. Dordrecht: Kluwer Academic Publications; 2002.
- Grzybowski J, Kalcsics J, Nickel S, Pallaschke D, Urbański R. On max-min representations of Ordered median functions. Optimization. 2015;64(2):339–348.
- Grzybowski J, Kalcsics J, Nickel S, Pallaschke D, Urbański R. On topological Types of Ordered Median Functions. Optimization. 2014;64(1):149–160.
- Mangasarian OL. Nonlinear programming. New York (NY): McGraw-Hill Book Company; 1969.