Посилання:On Samuelson Submanifolds in Four Space / J.B. Cooper, T. Russell // Збірник праць Інституту математики НАН України. — 2009. — Т. 6, № 2. — С. 264-275. — Бібліогр.: 21 назв. — англ.
The object of study in this talk is a general class of submanifolds of R^4. The motivation for this work was the derivation of the following equation which answered a question posed by the distinguished economist P.A. Samuelson.