@article{JAC_2012__35_1_a3,
     author = {Bannai, Eiichi and Bannai, Etsuko and Hirao, Masatake and Sawa, Masanori},
     title = {On the existence of minimum cubature formulas for {Gaussian} measure on $\mathbb R^{2}$ of degree $t$ supported by $[\frac{t}{4}]+1$ circles},
     journal = {Journal of Algebraic Combinatorics},
     pages = {109--119},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2012__35_1_a3/}
}