Ortiz de Landázuri, C. 1999. Pycior, Helena M.: Simbols, Imposible Numbers, and Geometric Entanglements. British Algebra Through the Commentaries on Newton’s Universal Arithmetic, Cambridge University Press, Cambridge, 1997, 328 págs. Anuario Filosófico. 32, 2 (sep. 1999), 565-566. https://doi.org/10.15581/009.32.31378.