@article{BaB:95,
   author    = {V.~Balakrishnan and S. Boyd},
   title     = {Existence and Uniqueness of Optimal Matrix Scalings},
   journal   = {SIAM J. on Matrix Analysis and Applications},
   year      = {1995},
   month     = jan,
   volume    = 16,
   number    = 1,
   pages     = {29-39}
}