@article{articlefa2c6398,
title   = {Rigorous numerics for ill-posed pdes: periodic orbits in the Boussinesq equation},
author = {Castelli, Roberto and Gameiro, Márcio Fuzeto and Lessard, Jean-Philippe},
year = {2018},
doi = {10.1007/s00205-017-1186-0},
journal   = {Archive for Rational Mechanics and Analysis}
}