@book{171843,
	author = {May, Michael T.},
	title = {Renewed interest in heavy oils and rock asphalt in South Central Kentucky},
	year = {45-ago. 2009},
	note = {Direct-current and microwave heating, along with traditional steamflooding and SAGD, are being considered to meet these reservoirs' great challenge: economically lowering the viscosity of heavy-end hydrocarbons.}
}