title = {Vertex cover: further observations and further improvements},
author = {Jianer Chen and Iyad A. Kanj and Weijia Jia},
booktitle = {Proc. 25th Int. Worksh. Graph-Theoretic Concepts in Computer Science (WG 1999)},
number = {1665},
editor = {Peter Widmayer and Gabriele Neyer and Stephan Eidenbenz},
series = {Lecture Notes in Computer Science},
publisher = {Springer-Verlag},
pages = {313--324},
year = {1999},
url = {}}

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