Extremal problems for cubature formulasLevin, Meiše; Giršovitš, JuriSoviet mathematics doklady : translation of all the pure mathematics sections of doklady Akademii Nauk SSSR1977 / p. 1355-1358

Extremal problems for cubature formulasGiršovitš, Juri; Levin, MeišeEesti NSV Teaduste Akadeemia toimetised. Füüsika. Matemaatika = Известия Академии наук Эстонской ССР. Физика. Математика = Proceedings of Academy of Sciences of the Estonian SSR. Physics. Mathematics1978 / lk. 151-158 https://www.ester.ee/record=b1264310*est