Spatial query processing for location based services by Liu, Yaqiong

“…We propose a five-step approximate algorithm, namely, ALG-COTER, which answers COTER using optimized single-source shortest-path algorithm, topological sorting, dynamic programming, nonlinear programming and backtrack algorithms. …”
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Algorithms and algorithmic obstacles for probabilistic combinatorial structures by Li, Quan, Ph. D. Massachusetts Institute of Technology

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