@book{144079,
	author = {Putra, Satya A. and Colorado School of Mines and SPE Annual Technical Conference and Exhibition (2001 sept. 30-3 oct. : New Orleans) and Christiansen, Richard L. and Colorado School of Mines},
	title = {Design of tubing collar inserts for producing gas wells below their critical velocity},
	note = {Disponible en formato PDF.}
}