@misc{misc42cd057e,
title   = {Investigating the effect of the focal spot size changes on the radiologic images quality},
author = {Oliveira, H J Q and Frere, A F and Schiabel, Homero and Marques, M A and Ferrari, R J and Marques, P M A},
year = {1994},
booktitle   = {World Congress on Medical Physics and Biomedical Engineering}
}