@article{0031-9120-47-5-579,
title = {Should we bother with the speed of light in everyday life? A closer look at GSM technology},
url = {http://stacks.iop.org/0031-9120/47/i=5/a=579},
journal = {Physics Education},
author = {Tomasz Kawalec},
volume = {47},
year = {2012},
pages = {579},
number = {5}
}