title = {A unified approach to approximation problems for NP- and PSPACE-hard problems for geometric graphs},
author = {Harry B. Hunt III and Madhav V. Marathe and Venkatesh Radhakrishnan and S. S. Ravi and Daniel J. Rosenkrantz and Richard E. Stearns},
booktitle = {Proc. 2nd Eur. Symp. Algorithms (ESA 1994)},
number = {855},
editor = {Jan van Leeuwen},
series = {Lecture Notes in Computer Science},
publisher = {Springer-Verlag},
pages = {424--435},
month = {Sep},
year = {1994}}

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