%0 Journal Article %T Virtual Source Aperture Imaging and Calibration for Ultrasonic Inspections through Dual-Layered Media for Non-Destructive Testing %A Sutkliffe, M.. %A Charlton, P.. %A Weston, M.. %A Mosey, S.. %K %J NDT World %D 2019 %N 21 %P 6 %I LLC SVEN