Touring a sequence of polygons
Proceedings of the thirty-fifth annual ACM symposium on Theory of computing
An approximative solution to the Zookeeper's Problem
Information Processing Letters
Approximation algorithms for the watchman route and zookeeper's problems
Discrete Applied Mathematics - The 1st cologne-twente workshop on graphs and combinatorial optimization (CTW 2001)
A 2-approximation algorithm for the zookeeper's problem
Information Processing Letters
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