@article{10_21136_AM_1974_103558,
     author = {Segeth, Karel},
     title = {Universal approximation by systems of hill functions},
     journal = {Applications of Mathematics},
     pages = {403--436},
     publisher = {mathdoc},
     volume = {19},
     number = {6},
     year = {1974},
     doi = {10.21136/AM.1974.103558},
     mrnumber = {0388812},
     zbl = {0305.41011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1974.103558/}
}