The following publications are possibly variants of this publication:
- Traversal of an Unknown Directed Graph by a Finite RobotIgor B. Bourdonov. pcs, 30(4):188-203, 2004. [doi]
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- Irredundant Algorithms for Traversing Directed Graphs: The Deterministic CaseIgor B. Bourdonov, Alexander Kossatchev, Victor V. Kuliamin. pcs, 29(5):245-258, 2003. [doi]