35/44-approximation for Asymmetric Maximum TSP with Triangle Inequality. Kowalik, L. & Mucha, M. Algorithmica, 59:240--255, 2009.
bibtex   
@article{kowalik_35/44-approximation_2009,
	title = {35/44-approximation for {Asymmetric} {Maximum} {TSP} with {Triangle} {Inequality}},
	volume = {59},
	journal = {Algorithmica},
	author = {Kowalik, L. and Mucha, M.},
	year = {2009},
	pages = {240--255}
}

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