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Shortest paths avoiding forbidden subpathsAhmed, Mustaq; Lubiw, Anna · Networks · 2013
SHORTEST DESCENDING PATHS: TOWARDS AN EXACT ALGORITHMAHMED, MUSTAQ; LUBIW, ANNA · International Journal of Computational Geometry & Applications · 2011
Approximation algorithms for shortest descending paths in terrainsMustaq Ahmed; Sandip Das; Sachin Lodha; Anna Lubiw; Anil Maheshwari; Sasanka Roy · 2010