@JournalArticle {SIEEUM13005,
	title = {Estimation of the rock deformation modulus and RMR based on data mining techniques},
	journal = {Geotechnical and Geological Engineering},
	volume = {30},
	number = {4},
	year = {2012},
	month = {2012-01-01 00:00:00},
	pages = {787{\textendash}801},
	publisher = {Kluwer Academic Publishers},
	address = {Netherlands},
	keywords = {Data Mining, Deformation modulus, Machine learning, RMR},
	issn = {1573-1529},
	url = {http://sieeum.eng.uminho.pt/publicacoes/pub.aspx?pubid=13005},
	author = {Martins, F. F. and Miranda, T.}
}