@article {14597,
	title = {Three-dimensional active earth pressure coefficients by upper bound numerical limit analysis},
	journal = {Computers and Geotechnics},
	volume = {79},
	year = {2016},
	pages = {96-104},
	author = {A. Nunes Ant{\~a}o and Santana, T. and M. Vicente da Silva and N. M. da Costa Guerra}
}
