@article{CRMATH_2003__337_2_85_0,
     author = {Kazarian, Kazaros},
     title = {A complete orthonormal system of divergence},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {85--88},
     publisher = {Elsevier},
     volume = {337},
     number = {2},
     year = {2003},
     doi = {10.1016/S1631-073X(03)00286-3},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/S1631-073X(03)00286-3/}
}