Helfield, B L Scaling of the viscoelastic shell properties of phospholipid encapsulated microbubbles with ultrasound frequency. [electronic resource] - Ultrasonics Aug 2014 - 1419-24 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1874-9968 Standard No.: 10.1016/j.ultras.2014.03.014 doi Subjects--Topical Terms: Coated Materials, Biocompatible--chemistryContrast Media--chemistryMicrobubblesModels, TheoreticalPhospholipids--chemistryRheologyUltrasonographyViscoelastic Substances--chemistry