@article{ershkov_leshchenko_2021,  title={Analysis of the size of Solar system close to the state with zero total angular momentum via <i>Sundman’s inequality</i> },  volume={93},  ISSN={0001-3765},  url={https://doi.org/10.1590/0001-3765202120200269},  DOI={10.1590/0001-3765202120200269},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={ERSHKOV, SERGEY and LESHCHENKO, DMYTRO},  year={2021},  pages={e20200269} }