@Article{zbMATH03221919,
Author = {B. N. {Delone} and N. N. {Sandakova} and S. S. {Ryshkov}},
Title = {{Optimal cubature lattice for functions of two variables that are smooth on all sides}},
FJournal = {{Soviet Mathematics. Doklady}},
Journal = {{Sov. Math., Dokl.}},
ISSN = {0197-6788},
Volume = {6},
Pages = {836--839},
Year = {1965},
Publisher = {American Mathematical Society (AMS), Providence, RI},
Language = {English},
Zbl = {0136.43201}
}