Jones, Lucas A., Kimball, John S., McDonald, Kyle C., Chan, Steven Tsz K., Njoku, Eni G., and Oechel, Walter C., 2007, Satellite microwave remote sensing of boreal and Arctic soil temperatures from AMSR-E: IEEE Transactions on Geoscience and Remote Sensing, v. 45, no. 7; 7, p. 2004-2018.