Graph Homomorphisms, Circular Colouring, and Fractional Covering by H-cuts - Robert Engström; Tommy Färnqvist; Peter Jonsson; Johan Thapper (CoRR, 2009)

Properties of an Approximability-related Parameter on Circular Complete Graphs. - Robert Engström; Tommy Färnqvist; Peter Jonsson; Johan Thapper (Electron. Notes Discret. Math., 2009)

An Approximability-related Parameter on Graphs - Properties and Applications. - Robert Engström; Tommy Färnqvist; Peter Jonsson; Johan Thapper (Discret. Math. Theor. Comput. Sci., 2015)