@article{CombotKoutschan12,
author = {Thierry Combot and Christoph Koutschan},
title = {Third order integrability conditions for homogeneous potentials of degree~$-1$},
journal = {Journal of Mathematical Physics},
year = {2012},
volume = {53},
number = {8},
pages = {082704},
isbn_issn = {ISSN 0022-2488},
doi = {10.1063/1.4746691},
}