Nutan Limaye, Meena Mahajan, Prajakta Nimbhorkar. Longest Paths in Planar DAGs in Unambiguous Logspace. In Rod Downey, Prabhu Manyem, editors, Theory of Computing 2009, Fifteenth Computing: The Australasian Theory Symposium, CATS 2009, Wellington, New Zealand, January 2009. Volume 94 of CRPIT, pages 99-105, Australian Computer Society, 2009. [doi]
Abstract is missing.