Hayashr, T. “On the Impossibility of the Indeterminate Equation X<sup>n</sup>+Y<sup>n</sup>=nZ<sup>n</sup>, in Which <sup>n</sup>Is an Odd Prime Integer”. The Journal of the Indian Mathematical Society, vol. 3, no. 1, Feb. 1911, pp. 16-22, doi:10.18311/jims/1911/17823.