@article {43776,
	title = {Chemical derivatization of Athabasca oil sand asphaltene for analysis of hydroxyl and carboxyl groups via nuclear magnetic resonance spectroscopy},
	volume = {81},
	year = {2002},
	pages = {1305-1319},
	publisher = {Fuel},
	author = {Desando, Michael A. and Ripmeester, John A.}
}
