@article{Zavadil2017inter-laboratory,
author={Zavadil, T..},
title={Inter-Laboratory Proficiency Testing of NDT Labs according to ISO 17043 as a Tool for Continuous Improvement Principle according to ISO 9001},
journal={NDT World},
publisher={LLC SVEN},
year={2017},
pages={61-64},
volume={20},
issue={4},
}