@article{SIGMA_2014_10_a8,
     author = {Richard V. Kadison and Zhe Liu},
     title = {The {Heisenberg} {Relation~{\textemdash}} {Mathematical} {Formulations}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2014},
     volume = {10},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2014_10_a8/}
}