@ARTICLE {4276,
author={L. Antunes and A. Matos and A. Souto and P. Vitányi},
doi={10.1007/s00224-009-9171-0},
journal={Theory of Computing Systems},
title={Depth as Randomness deficiency},
year={2009},
month={January},
volume={45},
number={4},
pages={724-739},
ISSN={1433-0490}
}