A*

Heuristics

https://stackoverflow.com/questions/9140860/heuristic-function-for-finding-the-path-using-a-star?rq=1

http://theory.stanford.edu/~amitp/GameProgramming/Heuristics.html

http://www.redblobgames.com/pathfinding/grids/algorithms.html

https://www.microsoft.com/en-us/research/wp-content/uploads/2004/07/tr-2004-24.pdf

https://webdocs.cs.ualberta.ca/~holte/Publications/SufficientConditions-ICAPS2017.pdf - Algorithm

Implementation

https://au.mathworks.com/matlabcentral/fileexchange/56877-a---astar---a-star--search-algorithm-easy-to-use

http://cs.indstate.edu/hgopireddy/algor.pdf

http://www.redblobgames.com/grids/hexagons/#distances

http://codereview.stackexchange.com/questions/118570/a-implementation?rq=1

http://codereview.stackexchange.com/questions/114351/a-search-in-matlab

minimum cost heuristics - google

http://theory.stanford.edu/~amitp/GameProgramming/Heuristics.html -- Different types of heuristics

http://www.redblobgames.com/pathfinding/a-star/introduction.html

http://theory.stanford.edu/~amitp/GameProgramming/AStarComparison.html

http://theory.stanford.edu/~amitp/GameProgramming/Heuristics.html#a-stars-use-of-the-heuristic : how to choose heuristics

http://www.redblobgames.com/pathfinding/grids/graphs.html

http://www.redblobgames.com/pathfinding/a-star/implementation.html#python-astar

http://www.redblobgames.com/pathfinding/a-star/introduction.html

http://ai.stanford.edu/~nilsson/OnlinePubs-Nils/PublishedPapers/astar.pdf

https://www.youtube.com/watch?v=DhtSZhakyOo

MatLab:

http://codereview.stackexchange.com/questions/114351/a-search-in-matlab