updated reference

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@article{ESILVA2017207,

	title={Graph drawing by force-directed placement},

title = {Drawing graphs with mathematical programming and variable neighborhood search},

	author={Fruchterman, Thomas MJ and Reingold, Edward M},

journal = {Electronic Notes in Discrete Mathematics},

	journal={Software: Practice and experience},

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year = {2017},

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doi = {http://dx.doi.org/10.1016/j.endm.2017.03.027},

	publisher={Wiley Online Library}

author = {Cézar Augusto N. e Silva and Haroldo Gambini Santos}

}

@article{tamassia,

	author = {Roberto Tamassia, Giuseppe Di Battista, Carlo Batini},

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}

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author = {Nenad Mladenovi\'{c}, Pierre Hansen },

title = {Variable Neighborhood Search},

journal = {Computers \& Operations Research},

publisher= {Pergamon},

year = {1997},

volume = {24},

issue = {11},

pages = {1097-1100}

}

@article{calerd,

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}

@inproceedings{dgnuv,

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}

@incollection{ga2dpacking,

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	publisher={Int. J. Production Economics},

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	year={2013},

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	day = {18},

	language={English}

}

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}

@article{kirk,

	author = {S. Kirkpatrick, C. D. Gelatt, M. P. Vecchi},

	title = {Optimization by Simulated Annealing},

	journal = {Science},

	journalsubtitle = {New Series},

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}

@misc{yed,

	howpublished = {http://www.yworks.com/en/products/yfiles/yed/},

	author = {\textbf{yEd Works the diagramming company}},

	year = {2015},

	month = {Junho}

}

@misc{neato,

	title = {Graphviz( http://www.graphviz.org,http://www.graphviz.org/pdf/neatoguide.pdf)},

	author = {\textbf{Graphviz - Graph Visualization Software,Envisioning connections}},

	year = {2015},

	month = {Junho}

}

@misc{gtk,

	title = {GTK+, or the GIMP Toolkit, is a multi-platform toolkit for creating graphical user interfaces( http://www.gtk.org)},

	author = {\textbf{The GTK+ Project}},

	year = {2015},

	month = {Junho}

}

@article{ron,

	author = {Ron Davidson And David Harel},

	title = {Drawing Graphs Nicely Using Simulated Annealing},

	journal = {ACM Transactions on Graphics},

	month = {October},

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	number = {4},

	pages={301--331},

	publisher={ACM}

}

@article{gdnphard,

	author = {D.S. Johnson},

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}

@inproceedings{gadug,

	title={Using genetic algorithms for drawing undirected graphs},

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}

@incollection{graphviz,

	year={2002},

	isbn={978-3-540-43309-5},

	booktitle={Graph Drawing},

	volume={2265},

	series={Lecture Notes in Computer Science},

	editor={Mutzel, Petra and Jünger, Michael and Leipert, Sebastian},

	doi={10.1007/3-540-45848-4_57},

	title={Graphviz— Open Source Graph Drawing Tools},

	url={http://dx.doi.org/10.1007/3-540-45848-4_57},

	publisher={Springer Berlin Heidelberg},

	author={\textbf{Ellson, John and Gansner, Emden and Koutsofios, Lefteris and North, StephenC. and Woodhull, Gordon}},

	pages={483-484},

	language={English}

}

@article{seqvnd,

	title={Sequential variable neighborhood descent variants: an empirical study on the traveling salesman problem},

	author={Mjirda, Anis and Todosijevi{\'c}, Raca and Hanafi, Sa{\"\i}d and Hansen, Pierre and Mladenovi{\'c}, Nenad},

	journal={International Transactions in Operational Research},

	year={2016},

	publisher={Wiley Online Library}

}

@article{Souza2010,

	title = "A hybrid heuristic algorithm for the open-pit-mining operational planning problem",

	journal = "European Journal of Operational Research",

	volume = "207",

	number = "2",

	pages = "1041 - 1051",

	year = "2010",

	issn = "0377-2217",

	doi = "10.1016/j.ejor.2010.05.031",

	url = "http://www.sciencedirect.com/science/article/pii/S0377221710003875",

	author = "Souza, Marcone J.F. and Coelho, Igor M. and Ribas, Sabir and Santos, Haroldo G. and Merschmann, Luiz H.C.",

	keywords = "Open-pit-mining",

	keywords = "Metaheuristics",

	keywords = "<span style='font-family : courier'>GRASP</span>",

	keywords = "Variable neighborhood search",

	keywords = "Mathematical programming"

}

}