@article{DCG_1991__6_4_131147,
     author = {L.J. Billera and L.L. Rose},
     title = {A {Dimension} {Series} for {Multivariate} {Splines.}},
     journal = {Discrete & computational geometry},
     pages = {107--128},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {1991},
     zbl = {0725.13011},
     url = {http://geodesic.mathdoc.fr/item/DCG_1991__6_4_131147/}
}