Martinez, C. A. P., André L. M. Martinez, Manoel Ferreira Borges Neto, and Emerson Vitor Castelani. 2013. “SQUARE OF THE ERROR OCTONIONIC THEOREM AND HYPERCOMPLEX FOURIER SERIES”. Trends in Computational and Applied Mathematics 14 (3):483-95. https://doi.org/10.5540/tema.2013.014.03.0483.