Geodesic
On minimal cubature formulas exact for Haar polynomials of low degrees in the two-dimensional case
Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 7 (2014) no. 3, pp. 318-323

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A lower estimate for number of nodes of cubature formulas possessing the Haar $d$-property ($d \geqslant 2$) is obtained in the two-dimensional case. Examples of minimal cubature formulas with Haar $d$-property for $d=2$ and $d=3$ are given.
Keywords: minimal cubature formulas, Haar functions, Haar polynomials, Haar $d$-property. 
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     author = {Kirill A. Kirillov},
     title = {On minimal cubature formulas exact for {Haar} polynomials of low degrees in the two-dimensional case},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {318--323},
     publisher = {mathdoc},
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     number = {3},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2014_7_3_a5/}
}
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Kirill A. Kirillov. On minimal cubature formulas exact for Haar polynomials of low degrees in the two-dimensional case. Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 7 (2014) no. 3, pp. 318-323. http://geodesic.mathdoc.fr/item/JSFU_2014_7_3_a5/