@article{banach1927principe,
  title={Sur le principe de la condensation de singularit{\'e}s},
  author={Banach, Stefan and Steinhaus, Hugo},
  journal={Fundamenta Mathematicae},
  volume={1},
  number={9},
  pages={50--61},
  year={1927}
}

@article{sokal2011really,
  title={A really simple elementary proof of the uniform boundedness theorem},
  author={Sokal, Alan D},
  journal={The American Mathematical Monthly},
  volume={118},
  number={5},
  pages={450--452},
  year={2011},
  publisher={Taylor \& Francis}
}

@article{Weisstein_UBP,
  title={Uniform Boundedness Principle},
  author={Moslehian, Mohammad Sal and Weisstein, Eric W.},
  journal={From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/UniformBoundednessPrinciple.html}
}
