Журавский А. О кубическом характере числа 1-ρ // Записки Горного института. 1928. Т. № 2 7. С. 15-26.
Zhuravskii A. On the cubic nature of the number 1-p // Journal of Mining Institute. 1928. Vol. № 2 7. p. 15-26.
This article gives a purely arithmetic method for obtaining the cubic character of the number 1—ᵽ. The method is based on the well-known Gauss lemma. For clarity, the author presents the numbers ɑ+βp, where ɑ and β are real as points of the plane. Thus, the problem comes down to finding the number of lattice points in a certain area. The result is achieved through a specific choice of fundamental area and appropriate division into parts.