@article{cerulli2009bounded,
  title={Bounded-degree spanning tree problems: models and new algorithms},
  author={Cerulli, Raffaele and Gentili, Monica and Iossa, A},
  journal={Computational Optimization and Applications},
  volume={42},
  number={3},
  pages={353--370},
  year={2009},
  publisher={Springer}
}