1. V.I. Arnold. On functions of three variables. Dokl. Akad. Nauk. SSSR 114 (1957), 679–681 (= AMS Transl. 28 (1963), 51–54).
2. V.I. Arnold. Representation of continuous functions of three variables by the superpositions of continuous functions of two variables. Math. Sb. (N.S.) 48(90) (1959), 3–74 (= AMS Transl. 2(28) (1963), 61–149).
3. L.A. Bassalygo. On the representation of continuous functions of two variables. Vestnik Moskow Univ. Ser I. Math. 27 (1966), 58–63.
4. K. Borsuk. Remark on the Cartesian product of two 1-dimensional spaces. Bull. Acad. Pol. Sci. Ser. Math. 23 (1975), 971–973.
5. K. Borsuk. Cartesian products of Cantor manifolds. Fund. Math. 38 (1951), 55–72.