Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hirokazu Okawa and Tomonao Saito and Ryota Hosokawa,Effects of different ultrasound irradiation frequencies and water temperatures on extraction rate of bitumen from oil sand,Japanese journal of applied physics : JJAP,00214922,Tokyo : The Japan Society of Applied Physics,2010-07,49,7,,https://cir.nii.ac.jp/crid/1520290883645562112,