Vitaly I. Voloshin. Greedy Algorithms for the Lower and Upper Chromatic Numbers. In Cristian S. Calude, Michael J. Dinneen, Silviu Sburlan, editors, Combinatorics, Computability and Logic, Proceedings of the Third International Conference on Combinatorics, Computability and Logic, DMTCS 20Ol, Constanta, Romania. Discrete mathematics and theoretical computer science, pages 241-251, Springer, 2001. [doi]
Abstract is missing.