@techreport{weko_91788_1,
   author	 = "Tatsuya,Imai and Kotaro,Nakagawa and N.V.Vinodchandran and A.Pavan and Osamu,Watanabe",
   title	 = "An <i>O</i>(<i>n</i><sup>1/2+ε</sup>)-Space and Polynomial-Time Algorithm for Directed Planar Reachability",
   year 	 = "2013",
   institution	 = "Dept. of Math. and Computer Science, Tokyo Inst. of Technology, Dept. of Math. and Computer Science, Tokyo Inst. of Technology, Dept. of Comp. Sci. & Eng., Univ. of Nebraska-Lincoln, Dept. of Computer Science, Iowa State University, Dept. of Math. and Computer Science, Tokyo Inst. of Technology",
   number	 = "25",
   month	 = "may"
}