@article{ariemannianlowrankmethodforoptimization,
  title = {A Riemannian low-rank method for optimization over semidefinite matrices with block-diagonal constraints},
  author = {Nicolas Boumal},
  year = {2015},
  eprint = {1506.00575},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1506.00575v2},
}