@article{10_4064_cm104_1_4,
     author = {Carsten Elsner},
     title = {On the approximation of real continuous functions
 by series of solutions of a single system
 of partial differential equations},
     journal = {Colloquium Mathematicum},
     pages = {57--84},
     publisher = {mathdoc},
     volume = {104},
     number = {1},
     year = {2006},
     doi = {10.4064/cm104-1-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm104-1-4/}
}