@article{FreudenbergerShavgulidze2015,
  author    = {J{\"u}rgen Freudenberger and Sergo Shavgulidze},
  title     = {New Four-Dimensional Signal Constellations From Lipschitz Integers for Transmission Over the Gaussian Channel},
  journal   = {IEEE Transactions on Communications},
  volume    = {Volume 63},
  number    = {Issue 7},
  pages     = {2420 -- 2427},
  doi       = {10.1109/TCOMM.2015.2441691},
  year        = {2015},
}