@article{Sutkliffe2019virtual,
author={Sutkliffe, M.. and Charlton, P.. and Weston, M.. and Mosey, S..},
title={Virtual Source Aperture Imaging and Calibration  for Ultrasonic Inspections through Dual-Layered Media  for Non-Destructive Testing},
journal={NDT World},
publisher={LLC SVEN},
year={2019},
pages={42-48},
volume={21},
issue={4},
}