R. Inkulu Sanjiv Kapoor Finding a Rectilinear Shortest Path in R<sup>2</sup> Using Corridor Based Staircase Structures. 412-423 2007 conf/fsttcs/2007 FSTTCS http://dx.doi.org/10.1007/978-3-540-77050-3_34 db/conf/fsttcs/fsttcs2007.html#InkuluK07