@article{1950,
volume={243},
ISSN={2054-0272},
url={http://dx.doi.org/10.1098/rsta.1950.0012},
DOI={10.1098/rsta.1950.0012},
number={857},
journal={Philosophical Transactions of the Royal Society of London. Series A,
Mathematical and Physical Sciences},
publisher={The Royal Society},
year={1950},
month=sep,
pages={1–35} }