@article{SIGMA_2014_10_a13,
     author = {Vincent Caudrelier and Nicolas Cramp\'e and Qi Cheng Zhang},
     title = {Integrable {Boundary} for {Quad-Graph} {Systems:} {Three-Dimensional} {Boundary} {Consistency}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2014},
     volume = {10},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2014_10_a13/}
}